The Omega Speedmaster Moonwatch is one of the world's most iconic timepieces, having been a part of all six moon landings. This 42 mm Moonwatch in stainless steel, known as the "Sapphire Sandwich", features sapphire crystal glass on the front as well as on the caseback, allowing a view of the movement. Inspired by the 4th generation Speedmaster style worn on the moon, it includes an asymmetrical case, black step dial with an applied OMEGA logo, and the famous dot over 90 on the anodised aluminium bezel ring. The watch is driven by the OMEGA Co-Axial Master Chronometer Calibre 3861, a manual-winding movement with METAS certification, resistant to magnetic fields reaching 15,000 gauss.