Omega. A titanium automatic calendar chronograph bracelet watch Model: Seamaster Professional Reference: 1780504.3780504 Date: Circa 2011 Movement: 25-jewel Cal.1154 automatic, No.48603526 Dial: Blue wave motif, applied luminous dot hour markers, date aperture at 3, subsidiary dials at 6, 9 and 12 for seconds, 30 minute and 12 hour recording, raised outer 1/5th second divisions, polished pierced sword hands with luminous tips, centre chronograph hand Case: Brushed and polished round, screw down back, uni-directional calibrated bezel with blue insert, No.48603526 Strap/Bracelet: Fitted brushed and polished titanium link Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Size: 43mm Accompaniments: Two spare links