{"query": "421", "brand": null, "total": 2, "limit": 10, "matches": [{"slug": "a-lange-s-hne-421", "brand": "A. Lange & Söhne", "ref": "421", "model": "1815 Rattrapante Perpetual Calendar", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/a-lange-s-hne-421", "description": "The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar reference 421.025 in platinum was introduced in 2013 and remains in the current catalog. Collectors prioritize this reference for the caliber L101.1, a manual-wind movement comprising 631 parts that integrates a split-seconds chronograph with a perpetual calendar and moon phase. The 41.9mm case houses a solid silver dial with Arabic numerals and a railway-track minute scale, distinguishing it from the Datograph series. Its technical significance lies in being one of the brand's most complex serial production pieces, winning the Grand Complication prize at the 2013 GPHG. On the secondary market, this platinum model typically trades in the $140,000 to $180,000 range. A notable production variant is the \"Handwerkskunst\" edition, limited to 20 pieces, which features a tremblage-engraved dial and blue enamel, commanding significantly higher premiums at specialized auctions.", "score": 198}, {"slug": "rolex-6542", "brand": "Rolex", "ref": "6542", "model": "GMT-Master", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/rolex-6542", "description": "The Rolex GMT-Master reference 6542 in 18k yellow gold was produced between approximately 1955 and 1959. This reference represents the first generation of the GMT-Master line, originally developed for Pan Am pilots. The gold variant is significantly rarer than the steel counterpart, featuring a 38mm case without crown guards and the caliber 1036, 1065, or 1066 movement. Collectors prioritize this reference for its \"Bakelite\" bezel insert, which is prone to cracking and contains radioactive strontium-90. Gold models typically feature \"nipple\" dials with elevated hour markers and leaf-shaped hands. On the secondary market, prices for 18k gold 6542 models generally fall within the mid-to-high six-figure range, depending heavily on the preservation of the fragile bezel. A notable auction result occurred in 2016 when a well-preserved example with a cognac-colored Bakelite bezel sold for over $200,000.", "score": 71}]}