Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph - 42 mm Steel Case - Black Step Dial - 310.30.42.50.01.001 37 The fixed platinum bezel

The fixed platinum bezel

delivering enduring allure and timeless sophistication

yellow Rolesor Oyster bracelet with flat three-piece links

simplifying time adjustment with effortless precision

5 mm stainless steel case with helium escape valve

Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph - 42 mm Steel Case - Black Step Dial - 310.30.42.50.01.001 37 The fixed platinum bezel42 mm steel case, anodised aluminium bezel ring, hesalite crystal with omega logo in the centre, black step dial, Calibre 3861 manual winding chronometer movement with chronograph and small seconds. Water resistant to 50 metres (167 feet).