PATEK PHILIPPE FOR TIFFANY & CO “CALATRAVA” REF. 3520/10 Men’s wristwatch in 750 gold, with a slightly stained gold sunburst dial featuring applied black-enameled baton hour markers. Screw-down case back, crown bearing the brand’s logo. Mechanical movement, extra-thin Caliber 175, manual winding. Flexible 750 gold bracelet, braided links with “Clous de Paris” decoration, as is the bezel, with a 750-thousandths gold ratchet clasp, signed. Circa 1970–75. (Scratches, slight deformation of the bracelet). Dial, movement, and case back signed. Case back number 2669 164. Movement number 1139045. Gross weight: 75.30 g. - Diameter: 32 mm.