OMEGA Speedmaster Moonphase Co-Axial Master Chronometer Moonphase Chronograph 44.25mm Watch drop-a-hint and has a helium-escape valve

and has a helium-escape valve

while the caseback is stamped with the Constellation Observatory medallion

The skeleton hands and raised indexes are blued and are filled with white Super-LumiNova

Turning the watch over reveals a vertically-brushed caseback embossed with a God Chronos medallion

OMEGA Speedmaster Moonphase Co-Axial Master Chronometer Moonphase Chronograph 44.25mm Watch drop-a-hint and has a helium-escape valveThe Speedmaster is one of OMEGAs most iconic timepieces, having been a part of all six lunar missions. Taking the spirit of exploration a step further, this new Moonphase features two infinitely small yet photo realistic moons. This 44. 25 mm model features a black sun brushed dial, with rhodium plated indexes and hands. At 6 o'clock is the accurate Moonphase indication, which features a metallic crystal disc microstructured to obtain a high