Silver-tone stainless steel case, silver-tone stainless steel bracelet. Fixed tachymeter scale on a grey aluminium insert within the stainless steel bezel. Silver dial with luminous coating on hands and markers, featuring 18k Sedna gold hour and minute hands alongside applied index hour markers and minute markers around the outer rim. Analog display. Chronograph function driven by an Omega Calibre 3330 automatic movement based upon ETA Valjoux 7753 containing 31 jewels, beating at 28800 vph with a ~52-hour power reserve. Sapphire crystal provides scratch resistance. Screw-down crown and solid case back secured the watch. Round shape measures 38 mm in diameter and is approximately 13.2 mm thick. Fold-over clasp bracelet has an width of 18 mm. Water resistant to 100 meters / 330 feet. Includes multiple functions: chronograph, tachymeter, hour, minute, second. Part of the Speedmaster series from Omega.