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Due to its extreme rarity, the watch does not have a standard secondary market bracket, though it commands high-seven-figure prices at auction. In 2010, this specific yellow gold perpetual calendar chronograph sold at Christie’s for approximately $5.7 million, establishing it as one of the most expensive vintage wristwatches ever sold."}, "listing_stats": {"count": 16, "median": 185000.0, "low": 13500.0, "high": 340000.0, "brands": 1, "merchants": 6}, "listings": [{"id": "h_7745563459671", "title": "Patek Philippe Patek Philippe Perpetual Calendar Moonphase Chronograph", "brand": "Patek Philippe", "model": "Patek Philippe Perpetual Calendar Moonphase Chronograph", "reference": "40931142", "price_usd": 295000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph", "Moon Phase"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": 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