Omega Speedmaster Professional Moonwatch Steel, black dial

The Moonwatch in its long-running modern form. In production from 1996 until 2014, the reference 3570.50.00 carried the asymmetrical, twisted-lug Professional case, a shape that traces back to the 105.012 of the mid-1960s, under a Hesalite crystal on the hand-wound caliber 1861. Early examples bridge the transition from the predecessor caliber 861, which Omega's own reference archive lists alongside the 1861.