Omega Speedmaster Moonwatch Professional Chronograph 42mm 310.30.42.50.01.002-28788
This watch features a 42mm stainless-steel case, stainless-steel bracelet, aluminum bezel insert, front sapphire crystal, and sapphire crystal exhibition caseback. Screw-down caseback. 50-meter water resistance. Black dial with chronograph function and luminous hands and markers. Powered by Omega manual-wind co-axial master chronometer caliber 3861 with 50-hour power reserve. 20mm lug width.