Patek Philippe Calatrava 18k White Gold Watch. Model 5115. Manual winding movement. Rhodium-plated, fausses cotes decoration, straight line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self compensating free-sprung flat balance spring. 18 jewels. Caliber 215. 18k white gold case 35.0 mm in diameter. Screw-down case back. Protected winding crown. Original Patek sapphire crystal. Off-white enamel dial with roman numerals. Small seconds at 6 o'clock. Outer dot minute divisions. Oxidized gold feuille hands. 18k white gold hobnail decorated bezel. Black leather strap with 18K white gold tang buckle.