Omega Speedmaster '57 40.5 MM El Primero while the helium escape valve

while the helium escape valve has been given a conical design

18-carat yellow gold case houses an exclusive Longines in-house movement with a silicon balance-spring

This 42 mm model is crafted from stainless steel and includes a black ceramic bezel with a white enamel diving scale

To mark its 190th anniversary

Omega Speedmaster '57 40.5 MM El Primero while the helium escape valveThe Speedmaster is one of OMEGAs most iconic timepieces. Having been a part of all six lunar missions, the timepiece is an impressive representation of the brands adventurous pioneering spirit. This 40. 50 mm model, inspired by the legendary 1957 original, features a stainless steel case and a black dial with recessed hour markers showing vintage Super LumiNova from beneath. Along with rhodium plated Broad Arrow hands, there is a date window at 6