Cal.315/290 automatic nickel lever movement No 3402470 stamped with the Geneva seal, 29 jewels, free-sprung Gyromax balance, adjusted to heat, cold, isochronism and 5 positions, 18ct gold rotor, the circular cream dial with applied faceted square baton markers and outer dot minute markers, polished dauphine hands, centre seconds hand, date aperture at 3 o'clock, brushed and polished gilt surround, screw down exhibition back, angular down-turned lugs, brown leather Patek Philippe strap, engraved 750, PPCo, and assay marks, gold Patek Philippe buckle, the case, dial and movement signed, length of strap 230mm, diameter of bezel 40mm