Reference: 3729/1Date: Circa 1975Movement: 18-jewel Cal.215 manual wind, adjusted to heat, cold, isochronism & 5 positions, Gyromax balance, Stamp of Geneva, No.1324220Dial: Sunburst champagne, black Roman numerals, black pointed baton handsCase: Brushed and polished octagonal form, snap on back, stepped bezel, cabochon set crown, No.2764987Strap/Bracelet: Integral ridged linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 31mm Accompaniments: Patek Philippe box