Omega Speedmaster Racing 40mm Automatic Grey

000 gauss. Silicon balance-spring, 12-hour and 60-minute recorders.?, 2 barrels mounted in series, approved by METAS, minute and chronograph seconds hands, Omega Co-Axil cailber 9900 Self Winding chronograph with column wheel and Co-Axial escapement. Certified Master Chronometer, resistant to magnetic fields reaching 15, small seconds hand, time zone function. Central hour