Omega. An 18K gold automatic calendar bracelet watch Constellation, Ref 18301, London Hallmark for 1960Omega. An 18K gold automatic calendar bracelet watchModel: ConstellationReference: 18301Date: London Hallmark for 1960Movement: 24-jewel Cal.561 automatic, No.17378473Dial: Silvered with pale champagne centre, applied gilt baton hour markers with black accents, black inner minute divisions, date aperture at 3, gilt lance hands with black inserts, centre secondsCase: Brushed and polished round, snap on backStrap/Bracelet: Integrated woven linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 34mm Accompaniments: Omega box (AF)None