Pre-owned Omega Speedmaster Chronograph Watch Ref. 310.30.40.50.06.001. Silver-tone stainless steel case and bracelet. Fixed tachymeter bezel. Blue dial with silver-tone hands and index hour markers. Minute markers around outer rim. Analog dial with luminescent hands and markers. Chronograph with three sub-dials (60 sec, 30 min, 12 hour). Omega Calibre 3861 Automatic movement (Lemania 1873 base, 26 jewels, 21600 vph, 50-hour power reserve). Hesalite crystal. Solid case back. 39mm round case. Fold-over clasp with safety release. 50m water resistance. Functions: Chronograph, Hour, Minute, Small Second, Chronometer. Swiss Made. Speedmaster Series. Luxury Analog Chronometer Mens Watch.