Pre-owned Speedmaster Chronograph Tachymeter Black Dial Men's Watch 3870.50.31

Silver-tone stainless steel case and bracelet. Fixed tachymeter scale black PVD stainless steel bezel. Black dial with luminous silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and dial markers. Chronograph - three sub-dials displaying: 60 second, 30 minute and 12 hour. Omega Calibre 1861 Hand Wind movement, containing 18 Jewels, composed of 234 parts, bitting at 21600 vph, and has a power reserve of approximately 48 hours. Scratch resistant hesalite crystal. Stainless steel case back. Round case shape, case size: 42 mm, case thickness: 13.6 mm. Band width: 20 mm. Deployment clasp. Water resistant at 50 meters / 165 feet. Functions: chronograph, hour, minute, second, tachymeter. Additional Info: 35705000, 357050, 3570-50. Speedmaster Series. Dress watch style. Watch label: Swiss Made. Pre-owned Omega Speedmaster Chronograph Tachymeter Black Dial Men's Watch 3870.50.31.