Speedmaster Moonwatch Professional Co-Axial Master Chronometer

Model: 310.

Description: 42mm-  This watch has a stainless steel case with a sapphire crystal over the black step dial. The asymmetrical case features a black anodized aluminum bezel ring. It features a tachymeter bezel with the the famous dot over 90. The dial functions include hours, minutes, small seconds, a 12 hour counter, a 30 minute counter and central chronograph hand. It is powered by the OMEGA Co-Axial Master Chronometer Calibre 3861 manual winding chronograph movement. The movement can be viewed through the sapphire crystal case back.  It has a power reserve of 50 hours and is presented on a stainless steel five-link bracelet.