{"reference": {"slug": "patek-philippe-5212a-calatrava-weekly-calendar", "brand": "Patek Philippe", "ref": "5212A-001", "model": "Calatrava Weekly Calendar", "case_material": "Stainless Steel", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5212a-calatrava-weekly-calendar", "description": "The Patek Philippe Calatrava Weekly Calendar 5212A-001 entered production in 2019 and remains in the current catalog. This reference is notable for its 40mm case constructed from stainless steel, a metal rarely used in the Calatrava collection. It features a silvery opaline dial with a unique five-hand layout and typography based on the handwriting of one of the brand's designers. The watch houses the self-winding caliber 26-330 S C J SE, which includes a semi-integrated mechanism for displaying the day, date, and week number. Collectors value this model for its unusual complication and its departure from traditional dress watch aesthetics. On the secondary market, prices typically range between $30,000 and $40,000. A production note of interest is that the 5212A introduced the caliber 26-330, which featured technical optimizations like a hacking seconds function and a redesigned winding system subsequently rolled out to other major references."}, "listing_stats": {"count": 10, "median": 42500.0, "low": 36000.0, "high": 44500.0, "brands": 1, "merchants": 2}, "listings": [{"id": "h_7643877670999", "title": "Patek Philippe \"-AS11997 Patek Philippe Calatrava Weekly Calendar", "brand": "Patek Philippe", "model": "\"-AS11997 Patek Philippe Calatrava Weekly Calendar", "reference": "AS11997", "price_usd": 42500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": 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