Model: CalatravaReference: 3588/7Date: Circa 1974Movement: 36-jewel Cal.28-255 automatic, adjusted to heat, cold, isochronism and 5 positions, No.1285800Dial: Sunburst blue, diamond set hour markers, polished faceted lance handsCase: Brushed and polished round, snap on back, diamond set bezel, No.2740053Strap/Bracelet: Integral textured link Buckle/Clasp: Signed folding claspSigned: Case, dial & movement Size: 35mm Accompaniments: Patek Philippe box, Extract from the Archives