{"reference": {"slug": "patek-philippe-1436", "brand": "Patek Philippe", "ref": "1436", "model": "Split-Seconds Chronograph", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-1436", "description": "Patek Philippe produced the Reference 1436 split-seconds chronograph from 1938 until 1971. While most examples were cased in yellow or pink gold, the stainless steel variant is among the rarest configurations in vintage watch collecting. The reference is powered by the manual-wind Caliber 13-130 CCR, a movement based on a Valjoux ebauche modified by Victorin Piguet. Collectors prioritize the steel 1436 due to its extreme scarcity; only a handful of steel examples are confirmed to exist. These models typically feature 33mm cases and silvered dials with applied Breguet numerals or long indices. On the secondary market, steel examples command significant premiums over gold counterparts, often reaching the mid-seven-figure range. A notable auction result occurred in 2015 when a stainless steel Reference 1436, originally sold through the retailer Tiffany & Co., realized over $3.3 million at Phillips in Geneva."}, "listing_stats": {"count": 2, "median": 243885.0, "low": 209770.0, "high": 278000.0, "brands": 1, "merchants": 2}, "listings": [{"id": "h_6957465894995", "title": "Patek Philippe Split Seconds Chronograph | 5004 | White Gold", "brand": "Patek Philippe", "model": "Split Seconds Chronograph | 5004 | White Gold", "reference": "5004", "price_usd": 278000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph", "Split-Seconds Chronograph"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/products/Patek_Philippe_Split_Seconds_Chronograph_5004_whitegold_A_Collected_Man_London_00.jpg?v=1678889909", "detail_url": "https://mostexpensivewatches.net/listing/h_6957465894995", "buy_url": "https://mostexpensivewatches.net/out/h_6957465894995", "available": false}, {"id": "h_7317322399831", "title": "Patek Philippe Patek Philippe Split-Seconds Chronograph", "brand": "Patek Philippe", "model": "Patek Philippe Split-Seconds Chronograph", "reference": "40930538", "price_usd": 209770.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph", "Split-Seconds Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10164_40930538_PATEKPHILIPPE_SPLITSECONDSCHRONOGRAPH_5370P-011-5.jpg?v=1730518237", "detail_url": "https://mostexpensivewatches.net/listing/h_7317322399831", "buy_url": "https://mostexpensivewatches.net/out/h_7317322399831", "available": false}], "auction_lots": [{"slug": "patek-philippe-1436-tiffany-signed", "brand": "Patek Philippe", "reference": "1436", "model": "Split-Seconds Chronograph", "case_material": "18k Yellow Gold", "hammer_usd": 540000, "year_sold": 2020, "venue": "Phillips Geneva", "lot_summary": "A rare split-seconds chronograph co-signed by Tiffany & Co. The 1436 was Patek's first serialized split-seconds wristwatch, and the double-signed dial adds a layer of American provenance and rarity.", "url": "https://mostexpensivewatches.net/auctions/patek-philippe-1436-tiffany-signed"}, {"slug": "patek-philippe-1436-2015", "brand": "Patek Philippe", "reference": "1436", "model": "Split-Seconds Chronograph", "case_material": "Stainless Steel", "hammer_usd": 3291000, "year_sold": 2015, "venue": "Phillips Geneva", "lot_summary": "One of only two known examples of the split-seconds chronograph reference 1436 in stainless steel, manufactured in 1945.", "source_url": "https://www.phillips.com/detail/patek-philippe/CH080215/169", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/patek-philippe-1436-2015"}]}