The legendary Replica OMEGA Speedmaster is one of the world’s most iconic timepieces, having played a role in all six lunar missions. Powering this stainless steel model is the famous Calibre 321, the driving force behind the chronograph’s extraordinary space history.
Inspired by the same 3rd generation style worn during America’s first spacewalk in 1965, this 39.7 mm model features a bezel ring in polished black ceramic [ZrO2], a tachymeter scale in white enamel; and a black step dial with Moonwatch hands and vintage OMEGA logo.
“As a further tribute to Speedmaster history, the Calibre 321 in steel includes the classic ‘Dot over 90’ on the bezel”
Famous manual-winding chronograph movement with column wheel mechanism, Breguet balance-spring and 18K SednaTM gold PVD coated finish. The calibre that was worn on the Moon.
Every Calibre 321 is created inside OMEGA’s Calibre 321 Workshop. This unique production space is dedicated entirely to the iconic movement, with all of the assembly steps being performed by the same watchmaker. The exacting process and attention to detail ensures that each new calibre is just as precise and legendary as the original.
“Ask most watch fans to name a famous movement they’d like to own and you’re bound to hear them mention the OMEGA Calibre 321”
Our brief history of the 321 provides a compelling back-story of the Moonwatch and its famous movement. Find out what makes this particular stainless steel version a legend in its own right.
Discover the first watch powered by OMEGA’s reborn 321. Crafted from a special platinum alloy with the use of gold (Pt950Au20), it features a black ceramic [ZrO2] bezel and tachymeter scale in white enamel.

Replica Omega Speedmaster Moonwatch PROFESSIONAL CHRONOGRAPH 42 MM Calibre 321 311.
Replica Omega Speedmaster Moonwatch CHRONOGRAPH 39.7 MM Calibre 321 311.