{"reference": {"slug": "iwc-iw503607", "brand": "IWC", "ref": "IW503607", "model": "Big Pilot Toto Wolff'", "case_material": "Ceratanium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/iwc-iw503607", "description": "The IWC Big Pilot’s Watch Perpetual Calendar Edition \"Toto Wolff\" (Reference IW503607) was released in 2022 as a limited edition of 100 units. This reference is notable for its 46.2mm case constructed from Ceratanium, a proprietary alloy combining the lightness of titanium with the scratch resistance of ceramic. It features a tinted sapphire crystal dial that exposes the IWC-manufactured 52615 caliber, a movement equipped with a Pellaton winding system and a seven-day power reserve. The perpetual calendar complication tracks the date, day, month, and year in four digits, including a moon phase display. On the secondary market, this reference typically commands prices between $45,000 and $60,000 depending on condition and provenance. A significant production detail is its association with the Mercedes-AMG Petronas Formula One Team; the final piece of the edition, number 100, was auctioned by Bonhams in 2022 for £160,000 to benefit charity."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "iwc-iw503607-2021", "brand": "IWC", "reference": "IW503607", "model": "Big Pilot's Watch Perpetual Calendar Edition 'Toto Wolff'", "case_material": "Ceratanium", "hammer_usd": 171000, "year_sold": 2021, "venue": "Christie's Geneva", "lot_summary": "A unique piece created for Only Watch 2021, featuring a Ceratanium case and a transparent glass dial, honoring the Mercedes-AMG Petronas F1 CEO.", "source_url": "https://www.christies.com/en/lot/lot-6344553", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/iwc-iw503607-2021"}]}