{"reference": {"slug": "a-lange-sohne-datograph-perpetual-tourbillon", "brand": "A. Lange & Söhne", "ref": "740.036", "model": "Datograph Perpetual Tourbillon", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/a-lange-sohne-datograph-perpetual-tourbillon", "description": "The A. Lange & Söhne Datograph Perpetual Tourbillon reference 740.036 was introduced in 2016 as a limited edition of 100 pieces in platinum. This reference features a black solid silver dial and houses the manual-wind caliber L952.2, which integrates a flyback chronograph, a perpetual calendar with a moon phase, and a one-minute tourbillon visible through the sapphire caseback. Collectors value this reference for its technical density and the inclusion of a stop-seconds mechanism for the tourbillon, a rare feature in high-complication movements. The 41.5mm platinum case houses 729 individual components. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often between $600,000 and $800,000 depending on condition and provenance. A notable production variant is the 740.056, released in 2019 with a \"salmon\" pink gold dial, which was also limited to 100 pieces."}, "listing_stats": {"count": 5, "median": 198000.0, "low": 190000.0, "high": 205000.0, "brands": 1, "merchants": 1}, "listings": [{"id": "h_7362555052115", "title": "A. Lange & Söhne Datograph Perpetual Tourbillon | Platinum", "brand": "A. Lange & Söhne", "model": "Datograph Perpetual Tourbillon | Platinum", "reference": "CCWPT_A1946", "price_usd": 205000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon", "Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/A_Lange___Sohne_Datograph_Perpetual_Tourbillon_740_036FE_platinum_A_Collected_Man_London_Thumbnail_00_v2.jpg?v=1718097372", "detail_url": "https://mostexpensivewatches.net/listing/h_7362555052115", "buy_url": "https://mostexpensivewatches.net/out/h_7362555052115", "available": false}, {"id": "h_6993051353171", "title": "A. Lange & Söhne Datograph Perpetual Tourbillon | 740.056 | White Gold", "brand": "A. Lange & Söhne", "model": "Datograph Perpetual Tourbillon | 740.056 | White Gold", "reference": "740.056", "price_usd": 200000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon", "Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/A._Lange___Sohne_Datograph_Perpetual_Tourbillon_740.056FE_whitegold_A_Collected_Man_London_00.jpg?v=1684838789", "detail_url": "https://mostexpensivewatches.net/listing/h_6993051353171", "buy_url": "https://mostexpensivewatches.net/out/h_6993051353171", "available": false}, {"id": "h_7102713692243", "title": "A. Lange & Söhne Datograph Perpetual Tourbillon | 740.056 | White Gold", "brand": "A. Lange & Söhne", "model": "Datograph Perpetual Tourbillon | 740.056 | White Gold", "reference": "740.056", "price_usd": 198000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon", "Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/A._Lange___Sohne_Datograph_Perpetual_Tourbillon_740.056FE_whitegold_A_Collected_Man_London_Thumbnail_00.jpg?v=1700487374", "detail_url": "https://mostexpensivewatches.net/listing/h_7102713692243", "buy_url": "https://mostexpensivewatches.net/out/h_7102713692243", "available": false}, {"id": "h_15345844224377", "title": "A. Lange & Söhne Datograph Perpetual Tourbillon | 740.056FE | White Gold", "brand": "A. Lange & Söhne", "model": "Datograph Perpetual Tourbillon | 740.056FE | White Gold", "reference": "056FE", "price_usd": 195000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon", "Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/A_Lange_Sohne_Datograph_Perpetual_Tourbillon_740_056FE_white_gold_A_Collected_Man_London_Thumbnail_00_0823645c-c6b7-4699-a514-6410e962d168.jpg?v=1770306859", "detail_url": "https://mostexpensivewatches.net/listing/h_15345844224377", "buy_url": "https://mostexpensivewatches.net/out/h_15345844224377", "available": false}, {"id": "h_14820054172025", "title": "A. Lange & Söhne Datograph Perpetual Tourbillon | 740.056FE | White Gold", "brand": "A. 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