Patek Philippe 5107 (Pre-owned - Good) — USD 20,990 on eBay

The Patek Philippe Calatrava Reference 5107 represents the Officer's Case variant within the Calatrava collection, distinguished by its hinged dust cover design. This reference was produced from 2006 to 2010, offering collectors a traditional officer's watch configuration in the classic Calatrava format. The 5107 features a 36mm case available in 18k yellow gold or 18k white gold, fitted with a smooth bezel and sapphire crystal. The manual-wind Caliber 215 PS movement provides 44 hours of power reserve. Dial options include ivory, silver, or black finishes, paired with a leather strap. Water resistance is rated to 30 meters. This reference appeals to collectors seeking a traditional officer's case configuration with the protective hinged dust cover. The 36mm sizing and manual movement positioning make it suitable for those preferring classic proportions and traditional winding mechanisms. The limited four-year production window and multiple material options provide collecting depth within this specific Calatrava variant.