PATEK PHILIPPE REF. 3919 CALATRAVA YELLOW GOLD Patek Philippe, GenËve, Calatrava, No. 1874943, case No. 4114201, Ref. 3919J. Made circa 1997. Very fine, thin and elegant, 18K yellow gold wristwatch with an 18K yellow gold Patek Philippe buckle. Accompanied by a fitted box, pouch, and hang tag. C.Two-body, solid, polished and brushed, hobnail decorated bezel, straight lugs, snap-on case back with dedication inscription, sapphire crystal. Porcelain white with painted radial Roman numerals, subsidiary seconds dial. Oxidized gold feuille hands. Cal. 215, stamped with the Seal of Geneva quality mark, rhodium plated, fausses cotes decoration, 18 jewels, straight- line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating free-sprung flat balance spring.