Bought in 2011 from authorised dealer. The OMEGA Speedmaster is one of OMEGAs most iconic timepieces. Having been a part of all six lunar missions. Crystal: Domed antireflective, scratchresistant sapphire crystal. Water resistance: 10 bar (100 metres / 330 feet). Selfwinding chronograph, chronometer movement with rhodiumplated finish. WATCH FUNCTIONS The crown has 3 positions: 1. Normal position (wearing position): when the crown is positioned against the case, the crown ensures that the watch is water-resistant. Occasional winding: if the watch has not been worn for 44 hours or ...