Pre owned Omega Speedmaster watch, Ref. 3506.31.00. Silver tone stainless steel case and bracelet with fixed tachymeter bezel. Analog white dial features silver tone hands, index hour markers, minute markers on the outer rim, date display at the 6 o'clock position. Equipped with chronograph functions: three sub-dials for 60 second, 30 minute, and 12 hour measurements. Powered by Omega Calibre 3301 Automatic movement containing 33 Jewels, operating at a frequency of 28800 vph (4Hz), offering approximately 52 hours power reserve. Features scratch resistant sapphire crystal. Round case shape measuring 42 mm in diameter. Includes fold over clasp with safety release mechanism and is water resistant up to 100 meters / 330 feet.