Swiss Omega racing chronograph [SPEEDMASTER] adopts 7750 to change the Swiss Omega 9900 chronograph movement,  the steel is made of imported AISI316L special steel and hardened, so the hardness reaches 240HV, you can see the case sand The pattern is clear, delicate, white, and there are no pores. The same material is created perfectly.  The transparent arc arched sapphire crystal glass mirror and the dial is more prominent.  The matte dial is matched with platinum-plated nails. The luminous is made of imported super luminous powder [4 The Speedmaster Moon series is equipped with a stainless steel strap and imported cowhide strap. The strap and ceramic ring can be interchanged with the original version. We may never be able to go to space, but at least one Swiss Omega Moonwatch can be owned in our lifetime.