Part of the legendary omega speedmaster collection the mark ii co axial chronograph watch has a matt black dial protected by scratch resistant sapphire crystal the three chronograph sub dials sit perfectly at the 3 6 and 9 oclock indices the transparent tachymeter scale on the crystal is illuminated from beneath by an aluminium ring filled with super luminova all encompassed in the 424mm brushed stainless steel case and matching bracelet and powered by the exclusive omega co axial calibre