Model: CalatravaReference: 2509Date: Circa 1960Movement: 18-jewel Cal.12-400 manual wind, adjusted to heat, cold, isochronism & 5 positions, Stamp of Geneva, No.723343Dial: White, black Roman numerals, subsidiary seconds at 6, black pointed baton handsCase: Brushed and polished round, screw down back, inner cap, No.681095Strap/Bracelet: Black leatherBuckle/Clasp: Signed 18K gold buckleSigned: Case, dial & movementSize: 35mm