{"reference": {"slug": "audemars-piguet-5402st", "brand": "Audemars Piguet", "ref": "5402ST", "model": "Royal Oak Jumbo A-Series", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-5402st", "description": "The Audemars Piguet Royal Oak 5402ST A-Series was produced between 1972 and approximately 1974, representing the first 2,000 units of the original Royal Oak production. Collectors prioritize the A-Series due to its historical status as the debut luxury steel sports watch and its specific design features, including the \"AP\" logo positioned at 6 o'clock rather than 12 o'clock. The reference features a 39mm monobloc case and the ultra-thin Calibre 2121, developed by Jaeger-LeCoultre. Secondary market prices typically fall within the $100,000 to $200,000 range, though exceptional examples with original \"tropical\" dials or full sets can exceed these figures. A notable production detail is the sequential numbering on the case back; collectors specifically seek the earliest \"A-Series\" designations, as later B, C, and D series moved the logo to the 12 o'clock position and saw higher production volumes."}, "listing_stats": {"count": 3, "median": 87500.0, "low": 64000.0, "high": 110000.0, "brands": 1, "merchants": 3}, "listings": [{"id": "h_7741241884881", "title": "Audemars Piguet Audemars Piguet Royal Oak 5402ST A Series Tropical Dial", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak 5402ST A Series Tropical Dial", "reference": "5402ST", "price_usd": 87500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 39.0, "movement": "Automatic", "complications": [], "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_5402ST_A_Series_Tropical_Dial.jpg?v=1778273627", "detail_url": "https://mostexpensivewatches.net/listing/h_7741241884881", "buy_url": "https://mostexpensivewatches.net/out/h_7741241884881", "available": true}, {"id": "h_6995942801517", "title": "Audemars Piguet 1972 Audemars Piguet Royal Oak (Ref. 5402ST) \"A Series\"", "brand": "Audemars Piguet", "model": "1972 Audemars Piguet Royal Oak (Ref. 5402ST) \"A Series\"", "reference": "5402ST", "price_usd": 110000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/products/Img016726copy.jpg?v=1681339389", "detail_url": "https://mostexpensivewatches.net/listing/h_6995942801517", "buy_url": "https://mostexpensivewatches.net/out/h_6995942801517", "available": false}, {"id": "h_15751409205593", "title": "Audemars Piguet Audemars Piguet Jumbo Royal Oak Yellow Gold 5402 Box and Papers", "brand": "Audemars Piguet", "model": "Audemars Piguet Jumbo Royal Oak Yellow Gold 5402 Box and Papers", "reference": "5402", "price_usd": 64000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-1033-Audemars-Piguet-Royal-Oak-Gold-Jumbo-5402BA_01.jpg?v=1756206810", "detail_url": "https://mostexpensivewatches.net/listing/h_15751409205593", "buy_url": "https://mostexpensivewatches.net/out/h_15751409205593", "available": false}], "auction_lots": [{"slug": "audemars-1499-jumbo-vintage", "brand": "Audemars Piguet", "reference": "5402ST", "model": "Royal Oak Jumbo A-Series", "case_material": "Stainless Steel", "hammer_usd": 1220000, "year_sold": 2022, "venue": "Phillips Hong Kong", "lot_summary": "1972 A-series Royal Oak — first 1000 examples ever made. Designed by Gérald Genta in a single night.", "url": "https://mostexpensivewatches.net/auctions/audemars-1499-jumbo-vintage"}, {"slug": "audemars-piguet-5402st-2025", "brand": "Audemars Piguet", "reference": "5402ST", "model": "Royal Oak \"B-Series\"", "case_material": "Stainless Steel", "hammer_usd": 59741, "year_sold": 2025, "venue": "Christie's Geneva", "lot_summary": "A well-preserved 'B-Series' Royal Oak from the late 1970s, representing the second production run of the original 5402 reference.", "source_url": "https://www.christies.com/en/lot/lot-6448910", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/audemars-piguet-5402st-2025"}]}