{"reference": {"slug": "audemars-piguet-25554st", "brand": "Audemars Piguet", "ref": "25554ST", "model": "Royal Oak Perpetual Calendar", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25554st", "description": "The Audemars Piguet Royal Oak Perpetual Calendar reference 25554ST was produced between approximately 1986 and 1991. Collectors prioritize this reference as the first Royal Oak to feature a perpetual calendar complication, marking a significant technical expansion for the model line. It utilizes the ultra-thin automatic caliber 2120/2800, derived from a Jaeger-LeCoultre base. The 39mm stainless steel case maintains the \"Jumbo\" proportions but lacks a leap year indicator on the dial, a characteristic of early generation perpetual calendars. Production was limited, with records suggesting fewer than 300 units were manufactured in steel. On the secondary market, these watches typically trade in the low-to-mid six-figure range depending on provenance and condition. A notable variant includes the \"Yves Klein\" dial, featuring a vibrant blue aesthetic, which often commands a significant premium at international auctions due to its rarity and visual distinction."}, "listing_stats": {"count": 4, "median": 251500.0, "low": 140000.0, "high": 275000.0, "brands": 1, "merchants": 3}, "listings": [{"id": "h_7761593598161", "title": "Audemars Piguet Audemars Piguet Royal Oak Perpetual Calendar 26574BC.OO.1220BC.01 \"Qatar Edition\"", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak Perpetual Calendar 26574BC.OO.1220BC.01 \"Qatar Edition\"", "reference": "1220BC.01", "price_usd": 258000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 41.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/Audemars_Piguet_Royal_Oak_Perpetual_Calendar_26574BC.OO.1220BC.01_Qatar_Edition__1.jpg?v=1781902330", "detail_url": "https://mostexpensivewatches.net/listing/h_7761593598161", "buy_url": "https://mostexpensivewatches.net/out/h_7761593598161", "available": true}, {"id": "h_7739650343121", "title": "Audemars Piguet Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "reference": "0944OR.01", "price_usd": 245000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Rose Gold", "case_size_mm": 39.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/Audemars_Piguet_Royal_Oak_Perpetual_Calendar_25810OR.OO.0944.01.jpg?v=1777670209", "detail_url": "https://mostexpensivewatches.net/listing/h_7739650343121", "buy_url": "https://mostexpensivewatches.net/out/h_7739650343121", "available": true}, {"id": "h_7404479185005", "title": "Audemars Piguet 1992 Audemars Piguet Royal Oak Quantième Perpetual Calendar 18K YG (Ref. 25636BA) Openwork \"Small Font\" Dial W/ Box, Winder, AP COA, AP Extract, AP Service Papers, & Accessories", "brand": "Audemars Piguet", "model": "1992 Audemars Piguet Royal Oak Quantième Perpetual Calendar 18K YG (Ref. 25636BA) Openwork \"Small Font\" Dial W/ Box, Winder, AP COA, AP Extract, AP Service Papers, & Accessories", "reference": "25636BA", "price_usd": 275000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/files/Img027679copy.jpg?v=1716510327", "detail_url": "https://mostexpensivewatches.net/listing/h_7404479185005", "buy_url": "https://mostexpensivewatches.net/out/h_7404479185005", "available": false}, {"id": "h_6968141906003", "title": "Audemars Piguet Royal Oak Perpetual Calendar Ultra-Thin | 26586IP | Titanium & Platinum", "brand": "Audemars Piguet", "model": "Royal Oak Perpetual Calendar Ultra-Thin | 26586IP | Titanium & Platinum", "reference": "26586IP", "price_usd": 140000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/products/Audemars_Piguet_Royal_Oak_Perpetual_Calendar_Ultra-Thin_RD-2_26586IP_OO_1240IP_01_titanium_platinum_A_Collected_Man_London_00.jpg?v=1681389703", "detail_url": "https://mostexpensivewatches.net/listing/h_6968141906003", "buy_url": "https://mostexpensivewatches.net/out/h_6968141906003", "available": false}], "auction_lots": [{"slug": "audemars-piguet-25554st-00-0344st-01-2022", "brand": "Audemars Piguet", "reference": "25554ST.00.0344ST.01", "model": "Royal Oak Perpetual Calendar", "case_material": "Stainless Steel", "hammer_usd": 200000, "year_sold": 2022, "venue": "Bonhams Paris", "lot_summary": "An early D-series example of the Royal Oak perpetual calendar, one of only 49 produced in stainless steel, featuring the ultra-thin Calibre 2120/2800.", "source_url": "https://www.bonhams.com/press_release/33890/", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/audemars-piguet-25554st-00-0344st-01-2022"}]}