Omega Speedmaster Moon Professional Co-Axial Master Chronometer Chronograph - 42 mm Steel Case - Black Dial - 310.30.42.50.01.002 Silver pioneering technology

pioneering technology

Inside beats the 4131 manufacture Rolex perpetual movement

The scratch-resistant sapphire crystal safeguards the immaculate White Dial

The round 40mm case

Omega Speedmaster Moon Professional Co-Axial Master Chronometer Chronograph - 42 mm Steel Case - Black Dial - 310.30.42.50.01.002 Silver pioneering technology42 mm steel case, sapphire crystal back, anodised aluminium bezel ring, domed scratch resistant sapphire crystal with anti reflective treatment inside, black step dial, Calibre Omega 3861 manual winding chronometer movement with chronograph and small seconds, approximately 50 hours of power reserve, steel bracelet. Water resistant to 50 metres (167 feet).