The OMEGA Speedmaster Moonwatch is an iconic 42mm chronograph, worn by astronauts on all six moon landings. This bi-colour model combines stainless steel and 18K Sedna™ Gold, featuring a black ceramic bezel with a tachymeter scale in OMEGA Ceragold™. The sun-brushed 18K Sedna™ Gold dial has black-coated subdials, and the watch is powered by the OMEGA Co-Axial Master Chronometer Calibre 3861. It’s finished with a black alligator strap and sapphire crystal on both the front and caseback.