Omega caliber 9906
Manual-winding chronograph with column wheel and Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Silicon balance-spring, 2 barrels mounted in series, time zone function. Central hour, minute and chronograph seconds hands, date function, small seconds counter, 12-hour and 60-minute counter. Rhodium plated finish with Geneva waves in arabesque.