Omega Speedmaster Moonwatch Professional 3861 Sapphire 310.30.42.50.01.002Overview The Omega Speedmaster Moonwatch Professional reference 310. 30. 42. 50. 01. 002 stands as the definitive modern iteration of one of horology's most iconic timepieces, embracing its legendary lineage while proudly showcasing its technical evolution. Directly descended from the watches worn on all six lunar missions, this model retains the timeless aesthetic of the original but is distinguished by its use of sapphire crystal on both the front