OMEGA 310.20.42.50.02.001 Automatic Movement Stainless Steel Case Chronograph Sapphire CrystalProduct Description The "Speedmaster Moonwatch" is one of the most iconic models in the world. It is the legendary chronograph worn by astronauts during all six lunar landing missions and symbolizes Omega's pioneering spirit. The bi color case, measuring 42mm, is made of stainless steel and 18K Moonshine gold, featuring sapphire crystal glass on the front and case back. The design is inspired by the fourth generation of the "Speedmaster" worn on the