{"reference": {"slug": "zenith-40", "brand": "Zenith", "ref": "40", "model": "El Primero A386 Unique Piece", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-40", "description": "The Zenith El Primero A386 Unique Piece in PT950 platinum was produced in 2019 to commemorate the 50th anniversary of the El Primero movement. This specific reference, designated 40.P386.400/57.C842, features a 38mm case and a unique lapis lazuli dial, distinguishing it from the standard tri-color sub-dial configurations of the original 1969 steel models. It houses the high-frequency Calibre 400 automatic chronograph movement. As a unique piece, it was created specifically for the Phillips Geneva Watch Auction: X, where it sold for 250,000 CHF. Because only one example exists, it does not have a standard secondary market price range; however, its valuation remains in the mid-six-figure bracket based on its singular auction history. The watch is notable for being the only vintage-style A386 ever officially produced by Zenith in platinum with a stone dial, and it includes a fifty-year international warranty."}, "lang": "ja", "url": "https://mostexpensivewatches.net/ja/alternatives/zenith-40", "reference_url": "https://mostexpensivewatches.net/ja/reference/zenith-40", "review_url": "https://mostexpensivewatches.net/ja/review/zenith-40", "listing_stats": {"count": 53, "median": 6500.0, "low": 3150.0, "high": 15000.0, "brands": 1, "merchants": 4}, "auction_comp_count": 10, "alternatives": [{"reference": {"slug": "zenith-39", "brand": "Zenith", "ref": "39", "model": "Chronomaster Triple Calendar", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-39", "description": "The Zenith Chronomaster Triple Calendar in platinum, specifically reference 17.0240.410, was produced during the mid-to-late 1990s and early 2000s. Collectors target this reference for its 39mm case diameter and the El Primero Caliber 410, an integrated high-beat automatic chronograph movement featuring a full calendar and moonphase. This specific platinum execution is distinguished by its weight and a silver or blue sunray dial, often featuring applied rhodium-plated indices. Unlike the more common steel variants, the platinum version was produced in limited quantities, representing a high-end complication from the brand’s transitional era. On the secondary market, these pieces typically trade between $12,000 and $18,000 depending on the presence of the original platinum deployment buckle and service history. A notable production detail is the \"Z\" series or limited editions featuring chronometer certification, which often command a premium at specialized watch auctions."}, "score": 16, "why_compare": "Same zenith collector universe; shared search intent: platinum, zenith; similar platinum case profile.", "listing_stats": {"count": 22, "median": 7125.0, "low": 5100.0, "high": 15000.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_7200548290635", "title": "Zenith Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "brand": "Zenith", "model": "Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "reference": "03.3401.3610.21.C911", "price_usd": 13500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Meteorite", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/Zenith-Soldier-Bracelet-Gray.jpg?v=1727369418", "detail_url": "https://mostexpensivewatches.net/listing/h_7200548290635", "buy_url": "https://mostexpensivewatches.net/out/h_7200548290635", "available": true}, "auction_comp_count": 2, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-39", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-39"}, {"reference": {"slug": "zenith-03", "brand": "Zenith", "ref": "03", "model": "Chronomaster Revival Lupin The Third Unique Piece", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-03", "description": "The Zenith Chronomaster Revival Lupin The Third Unique Piece (Reference 03.L384.400/50.M384) was produced in 2022 as a one-of-one creation to conclude the brand’s collaboration with the Japanese manga series. This 37mm stainless steel timepiece utilizes the El Primero 400 automatic caliber and features a \"split\" dial design that combines the aesthetics of the two previous limited editions. The dial is vertically bisected, showing a semi-glossy black side with grey sub-dials and a creamy white side with black sub-dials. It is paired with a steel ladder-style bracelet. This specific reference was never part of regular production and was sold at a Phillips auction in association with Bacs & Russo in November 2022. It realized a final price of 189,000 CHF. On the secondary market, its value remains in the high-six-figure range due to its status as a unique piece."}, "score": 15, "why_compare": "Same zenith collector universe; shared search intent: piece, unique.", "listing_stats": {"count": 49, "median": 6550.0, "low": 3150.0, "high": 20500.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_7200548290635", "title": "Zenith Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "brand": "Zenith", "model": "Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "reference": "03.3401.3610.21.C911", "price_usd": 13500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Meteorite", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/Zenith-Soldier-Bracelet-Gray.jpg?v=1727369418", "detail_url": "https://mostexpensivewatches.net/listing/h_7200548290635", "buy_url": "https://mostexpensivewatches.net/out/h_7200548290635", "available": true}, "auction_comp_count": 5, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-03", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-03"}, {"reference": {"slug": "zenith-a386", "brand": "Zenith", "ref": "A386", "model": "El Primero", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-a386", "description": "The Zenith El Primero A386 was produced between 1969 and approximately 1971, with an estimated total production of 2,500 units. Collectors prioritize this reference as the original housing for the Calibre 3019 PHC, one of the first integrated automatic chronograph movements operating at 36,000 vibrations per hour. The 38mm stainless steel case features a tri-color dial with overlapping sub-dials in silver, anthracite, and blue, a design distinct to this initial release. On the secondary market, prices typically range from $15,000 to over $25,000 depending on the presence of the original \"ladder\" bracelet manufactured by Gay Frères and the condition of the tritium lume. A notable production detail is the \"Mk 1\" dial variant, which lacks the \"36000 VpH\" text found on later iterations. In 2019, a unique platinum version created for Phillips auction house sold for 250,000 CHF, though steel examples remain the standard for vintage collectors."}, "score": 15, "why_compare": "Same zenith collector universe; shared search intent: a386, primero.", "listing_stats": {"count": 52, "median": 6750.0, "low": 3150.0, "high": 23800.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7450482114647", "title": "Zenith Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "brand": "Zenith", "model": "Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "reference": "1969", "price_usd": 8450.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10794_40992444_ZENITH_ELPRIMEROCHRONOMASTER1969_96.2260.4061-21.R575-5.jpg?v=1753224324", "detail_url": "https://mostexpensivewatches.net/listing/h_7450482114647", "buy_url": "https://mostexpensivewatches.net/out/h_7450482114647", "available": true}, "auction_comp_count": 6, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-a386", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-a386"}, {"reference": {"slug": "zenith-65", "brand": "Zenith", "ref": "65", "model": "El Primero A386 Only Watch 2019", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-65", "description": "The Zenith El Primero A386 Only Watch 2019 is a unique piece produced specifically for the 2019 Only Watch charity auction. This reference features a 38mm case constructed from 18k white gold, a material not used for the original 1969 A386 production. It houses the El Primero caliber 400, a high-frequency automatic integrated chronograph movement. The dial retains the signature tri-color sub-dial layout but replaces the standard blue register with a turquoise sub-dial at three o'clock, a color specific to the 2019 auction theme. Collectors value this reference for its status as a one-of-one production and its lifetime warranty and service package included by the manufacturer. At its original sale at Christie’s in November 2019, the watch realized a price of 75,000 CHF. Due to its unique nature, secondary market availability is non-existent, placing its theoretical value in the high five-figure to low six-figure range."}, "score": 15, "why_compare": "Same zenith collector universe; shared search intent: a386, primero.", "listing_stats": {"count": 11, "median": 9800.0, "low": 6950.0, "high": 15800.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_6851997630539", "title": "Zenith Zenith Chronomaster Sport El Primero Yoshida Limited Edition 65.3101.3600", "brand": "Zenith", "model": "Zenith Chronomaster Sport El Primero Yoshida Limited Edition 65.3101.3600", "reference": "3101.3600", "price_usd": 15800.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/Zenith-Chronomaster-Sport-Yoshida-65-3104-3600-52-C920-10-10-ZEN-1GZ9BC-af0f98f89108_eb47b89d-9051-43c8-9815-f727378ab1ab.jpg?v=1699652543", "detail_url": "https://mostexpensivewatches.net/listing/h_6851997630539", "buy_url": "https://mostexpensivewatches.net/out/h_6851997630539", "available": false}, "auction_comp_count": 2, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-65", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-65"}, {"reference": {"slug": "zenith-calibre", "brand": "Zenith", "ref": "CALIBRE", "model": "Zenith x Voutilainen x Phillips Unique Piece", "case_material": "Niobium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-calibre", "description": "The Zenith x Voutilainen x Phillips Unique Piece Calibre 135-O was produced in 2022 as a singular execution for the Geneva Watch Auction: XVI. This reference is valued for its historical movement, a 1950s-era Calibre 135 Observatoire chronometer movement restored and decorated by Kari Voutilainen. Unlike the limited edition of ten pieces in platinum, this unique piece features a 38mm case constructed from niobium, a rare refractory metal. The dial is made of guilloché-engraved blue gold with a matte finish and features a large sub-seconds register. As a unique piece, it does not have a standard secondary market price range, but it achieved a final sale price of 315,000 CHF at auction in November 2022. This specific reference represents the only time a vintage Zenith observatory movement has been housed in a niobium case for public sale."}, "score": 15, "why_compare": "Same zenith collector universe; shared search intent: piece, unique.", "listing_stats": {"count": 9, "median": 7800.0, "low": 6950.0, "high": 15000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_8379639464115", "title": "Zenith Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "brand": "Zenith", "model": "Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "reference": "—", "price_usd": 15000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "collective-horology", "merchant_name": "Collective Horology", "image_url": "https://cdn.shopify.com/s/files/1/0559/0623/8643/files/PB210230-2.jpg?v=1763862204", "detail_url": "https://mostexpensivewatches.net/listing/h_8379639464115", "buy_url": "https://mostexpensivewatches.net/out/h_8379639464115", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-calibre", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-calibre"}, {"reference": {"slug": "zenith-a3817", "brand": "Zenith", "ref": "A3817", "model": "El Primero", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-a3817", "description": "The Zenith El Primero A3817 was produced in 1971 with a total production run of approximately 1,000 units. Collectors prioritize this reference because it combines the tonneau-shaped stainless steel case of the A384 with the tri-color sub-dial aesthetic of the A386. It houses the high-frequency caliber 3019 PHC automatic chronograph movement. A distinguishing technical feature is the presence of a blue sub-seconds track with a pyramid-style scale, which is unique to this specific reference. On the secondary market, prices typically range from $12,000 to $20,000 depending on the condition and the presence of the original Gay Frères ladder bracelet. A notable production detail is that the A3817 is one of the rarest of the original 1969-1971 El Primero references, often considered a transitional design between the brand’s early experimental cases and its most recognized dial configurations."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 52, "median": 6750.0, "low": 3150.0, "high": 23800.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7450482114647", "title": "Zenith Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "brand": "Zenith", "model": "Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "reference": "1969", "price_usd": 8450.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10794_40992444_ZENITH_ELPRIMEROCHRONOMASTER1969_96.2260.4061-21.R575-5.jpg?v=1753224324", "detail_url": "https://mostexpensivewatches.net/listing/h_7450482114647", "buy_url": "https://mostexpensivewatches.net/out/h_7450482114647", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-a3817", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-a3817"}, {"reference": {"slug": "zenith-a3818", "brand": "Zenith", "ref": "A3818", "model": "El Primero", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-a3818", "description": "The Zenith El Primero A3818, nicknamed the \"Cover Girl,\" was produced between 1971 and 1972 with a total production run of approximately 1,000 units. Collectors prioritize this reference for its blue sunray dial featuring a \"shark tooth\" scale, which includes vertical sub-dial markings and a tachymeter integrated into the minute track. It utilizes the high-frequency El Primero 3019 PHC automatic chronograph movement housed in a 37mm stainless steel tonneau-shaped case. On the secondary market, vintage examples typically range from $15,000 to $25,000 depending on condition and the presence of the original Gay Frères ladder bracelet. A notable production detail is its appearance on the cover of Manfred Rössler’s book on Zenith, which solidified its nomenclature. In 2020, Zenith released a modern revival edition in collaboration with Revolution & The Rake, limited to 100 pieces, which maintains high resale value."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 52, "median": 6750.0, "low": 3150.0, "high": 23800.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7450482114647", "title": "Zenith Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "brand": "Zenith", "model": "Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "reference": "1969", "price_usd": 8450.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10794_40992444_ZENITH_ELPRIMEROCHRONOMASTER1969_96.2260.4061-21.R575-5.jpg?v=1753224324", "detail_url": "https://mostexpensivewatches.net/listing/h_7450482114647", "buy_url": "https://mostexpensivewatches.net/out/h_7450482114647", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-a3818", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-a3818"}, {"reference": {"slug": "zenith-g583", "brand": "Zenith", "ref": "G583", "model": "El Primero", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-g583", "description": "The Zenith El Primero G583 was produced between 1969 and 1972 as part of the initial launch of the El Primero high-beat automatic chronograph movement. This reference features a 37mm 18k yellow gold case with a round profile and pump pushers, distinguishing it from the angular steel A384 and A385 models of the same era. Collectors prioritize the G583 for its caliber 3019 PHC movement and its relative scarcity, as production was limited to approximately 600 units. The dial typically features a gold sunburst finish with black sub-dials and a tachymeter scale. On the secondary market, the G583 generally commands prices between $15,000 and $25,000 depending on the presence of the original gold ladder bracelet. A notable production detail is that the G583 represents one of the few precious metal executions from the original 1969 El Primero catalog."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 52, "median": 6750.0, "low": 3150.0, "high": 23800.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7450482114647", "title": "Zenith Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "brand": "Zenith", "model": "Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "reference": "1969", "price_usd": 8450.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10794_40992444_ZENITH_ELPRIMEROCHRONOMASTER1969_96.2260.4061-21.R575-5.jpg?v=1753224324", "detail_url": "https://mostexpensivewatches.net/listing/h_7450482114647", "buy_url": "https://mostexpensivewatches.net/out/h_7450482114647", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-g583", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-g583"}, {"reference": {"slug": "zenith-01", "brand": "Zenith", "ref": "01", "model": "El Primero Chronomaster Limited Edition", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-01", "description": "The Zenith El Primero Chronomaster Limited Edition 01, reference 03.20416.4061/51.M2040, was released in 2016 as a limited production of 500 units. Collectors prioritize this reference for its 42mm stainless steel case and the caliber 4061 automatic movement, which features a 50-hour power reserve and a 36,000 vibrations per hour frequency. The dial is distinguished by its sunray blue finish and an \"Open\" heart aperture at the 10 o'clock position, revealing the silicon escape wheel and lever. This specific edition was commissioned for the Americas market, featuring a caseback engraved with \"United States & Canada Edition.\" On the secondary market, this reference typically trades between $5,500 and $7,500 depending on the presence of the original steel bracelet or alligator strap. While most Chronomaster Open models are standard production, the 500-piece limitation and specific regional designation drive its specific collector interest."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 24, "median": 7775.0, "low": 3800.0, "high": 15800.0, "brands": 1, "merchants": 4}, "top_listing": {"id": "h_7200548290635", "title": "Zenith Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "brand": "Zenith", "model": "Chronomaster Original Triple Calendar Limited Edition For Hodinkee", "reference": "03.3401.3610.21.C911", "price_usd": 13500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Meteorite", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/Zenith-Soldier-Bracelet-Gray.jpg?v=1727369418", "detail_url": "https://mostexpensivewatches.net/listing/h_7200548290635", "buy_url": "https://mostexpensivewatches.net/out/h_7200548290635", "available": true}, "auction_comp_count": 7, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-01", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-01"}, {"reference": {"slug": "zenith-g381", "brand": "Zenith", "ref": "G381", "model": "El Primero Gold", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-g381", "description": "The Zenith El Primero G381 was produced between 1969 and 1972, with a total production run of 700 units. This reference is the 18k yellow gold counterpart to the steel A386, sharing the same 38mm round case architecture and the high-frequency caliber 3019 PHC automatic chronograph movement. Collectors prioritize the G381 for its historical status as one of the three original El Primero launch models and its distinct dial configuration, which features white sub-dials on a white lacquered background rather than the tri-color registers found on the steel version. On the secondary market, prices typically range from $20,000 to $40,000 depending on the presence of the original Gay Frères gold ladder bracelet. A notable production detail is that early examples feature a \"star\" logo on the crown and caseback, which transitioned to the \"NATO\" star during the later production years."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 52, "median": 6750.0, "low": 3150.0, "high": 23800.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7450482114647", "title": "Zenith Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "brand": "Zenith", "model": "Zenith Chronomaster El Primero 1969 'Rolling Stones Edition'", "reference": "1969", "price_usd": 8450.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10794_40992444_ZENITH_ELPRIMEROCHRONOMASTER1969_96.2260.4061-21.R575-5.jpg?v=1753224324", "detail_url": "https://mostexpensivewatches.net/listing/h_7450482114647", "buy_url": "https://mostexpensivewatches.net/out/h_7450482114647", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-g381", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-g381"}, {"reference": {"slug": "zenith-1205sp", "brand": "Zenith", "ref": "1205SP", "model": "El Primero Prototype", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-1205sp", "description": "The Zenith El Primero Prototype 1205SP is a pre-production chronograph manufactured between 1967 and 1969 during the development of the caliber 3019 PHC. Collectors prioritize this reference because it represents the earliest physical implementation of the high-frequency integrated automatic chronograph movement. The 1205SP features a 37mm stainless steel case with a screw-down caseback and a distinctive silver sunburst dial characterized by a date window at the 4:30 position and a lack of the \"El Primero\" branding found on later production models like the A384. Due to its status as a developmental prototype, production was limited to a small number of units, making it significantly rarer than standard production references. On the secondary market, these prototypes typically command prices in the mid-to-high five-figure range. A notable example sold at a 2019 Phillips auction for approximately 75,000 CHF, highlighting its historical importance as a functional testbed for the movement."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 9, "median": 7800.0, "low": 6950.0, "high": 15000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_8379639464115", "title": "Zenith Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "brand": "Zenith", "model": "Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "reference": "—", "price_usd": 15000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "collective-horology", "merchant_name": "Collective Horology", "image_url": "https://cdn.shopify.com/s/files/1/0559/0623/8643/files/PB210230-2.jpg?v=1763862204", "detail_url": "https://mostexpensivewatches.net/listing/h_8379639464115", "buy_url": "https://mostexpensivewatches.net/out/h_8379639464115", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-1205sp", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-1205sp"}, {"reference": {"slug": "zenith-3019", "brand": "Zenith", "ref": "3019", "model": "El Primero Prototype", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/zenith-3019", "description": "The Zenith El Primero 3019 PHC prototype in stainless steel was produced between 1968 and 1969 as a pre-series development piece for the world’s first integrated automatic high-beat chronograph. Collectors value this reference for its historical role as a functional testbed for the 36,000 vph caliber 3019 movement. These prototypes typically feature 38mm cases with distinct dial variations, including \"ghost\" or \"panda\" configurations that lack the final production branding or tachymeter scales found on the subsequent A384 or A386 models. Due to their extreme rarity and status as pre-production artifacts, these watches rarely appear on the open market. When they do, secondary market prices typically occupy the high-five-figure to low-six-figure range. A notable 2020 Phillips auction saw a steel prototype with a unique grey dial sell for approximately 250,000 CHF, highlighting the premium placed on documented development pieces."}, "score": 13, "why_compare": "Same zenith collector universe; shared search intent: primero, zenith.", "listing_stats": {"count": 9, "median": 7800.0, "low": 6950.0, "high": 15000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_8379639464115", "title": "Zenith Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "brand": "Zenith", "model": "Zenith DEFY Skyline C.X Ceramic Edition (Pre-owned)", "reference": "—", "price_usd": 15000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "collective-horology", "merchant_name": "Collective Horology", "image_url": "https://cdn.shopify.com/s/files/1/0559/0623/8643/files/PB210230-2.jpg?v=1763862204", "detail_url": "https://mostexpensivewatches.net/listing/h_8379639464115", "buy_url": "https://mostexpensivewatches.net/out/h_8379639464115", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/zenith-3019", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/zenith-3019"}]}