Omega Speedmaster Professional Moonwatch Co-Axial Master Chronometer 42mm

Omega 310.23.42.50.02.001 Speedmaster Professional Moonwatch Co-Axial Master Chronometer 42mm.  This Omega watch features a brushed and polished stainless steel and yellow gold case, an 18kt Moonshine yellow gold crown, and a fixed, polished bezel. Its silver sunray dial is stepped, with recessed sub-dials, applied luminous markers, and luminous hands. The small seconds sub-dial is located at 9 o'clock, while the chronograph function includes a large central seconds hand, a 30-minute counter at 3 o'clock, and a 12-hour counter at 6 o'clock. Powered by the Omega caliber 3861, this movement beats at 3Hz (21,600 vph), has 26 jewels, and offers a 50-hour power reserve.