Omega. An 18K gold automatic triple calendar chronograph bracelet watch Speedmaster Day-Date, Ref 31218000/175.0044, Circa 1990Omega. An 18K gold automatic triple calendar chronograph bracelet watchModel: Speedmaster Day-DateReference: 31218000/175.0044Date: Circa 1990Movement: 25-jewel Cal.1151 automaticDial: Sunburst blue, applied gilt baton hour markers, white outer 1/5th second divisions and calendar markers, subsidiary dials at 6, 9 and 12 for seconds and 24 hour indication, 30 minute and 12 hour recording, day and month apertures below 12, gilt pointed baton hands with luminous inserts, crescent tipped calendar hand Case: Brushed and polished tonneau form, snap on back, crown flanked by twin chronograph pushers, quick set button at 10, No.5522859Strap/Bracelet: Fitted 1489/813 Omega linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 39mm Accompaniments: Omega box, outer card, blank international warranty card, pictograms card, service receipt dated 2002, 4 spare links, operating instructions, swing tag The first Omega Speedmaster was released in 1957 and has gone on to enjoy enormous success and popularity. Since 1987 Omega have released many different versions of the Speedmaster Automatic. The current lot features a yellow gold case and a triple calendar function. Automatic Speedmasters are also known as the Speedmaster "Reduced" due to the smaller 39mm case size against the 42mm of the Speedmaster Professional models.