The First Manual-Wound Certified Rolex GMT-Master II Replica by COSC -- The Jubilee BA 148.052

1992 may not be the most talked about year when it comes to Rolex GMT-Master II Replica timeline. It deserves more attention, I'm sure.

50 years ago, Omega completed a project called the 27 CHRO C12 which resulted in the calibre 321 (Omega’s version of the CH27). In 1957, the Rolex GMT-Master II Replica's first decade was powered by the same calibre 321 15 years later.franck muller replica watches Let me clarify: This accounts for six Rolex GMT-Master II Replica's first references, the 2915 and the 2998, ST 105.002, ST 105.03, ST 105.012, ST 105.012, ST 105.012, ST 145.012, and ST 105.012. The Rolex GMT-Master II Replica was awarded the NASA approval stamp for flight qualification for all Manned Space Missions by ST 105.003.

The Omega Calibre 321 is Omega’s version of the Lemania 2310, also known as the CH 27 to watch collectors (Image: Bukowski auction House).

1963 Reference ST105.012 -- First Watch on the Moon ((c), Revolution)

The engineering feat of calibre 321 was a triumph. It proved its worth on the moon, earth, and in the absolute nothingness of space. Ken Kessler recounted the story in an earlier Rolex GMT-Master II Replica roundup article. He stated that at 56 hours into flight, on April 13, 1970, a ruptured fuel tank aboard Apollo 13 lunar module caused all its electrical systems to stop working.

The crew soon lost most of their power. They realized that they had no other option but to use the moon’s gravitational pull to propel them back to Earth. The angle at which the craft was re-entry was a major problem.Bell & Ross Replica Watches Too steep and it will burn up upon reentry. Too shallow and it will bounce off the atmosphere of the earth, causing the crew to drift aimlessly into space.

"Using Jim Swiggert’s Omega Rolex GMT-Master II Replica, they used the lunar module’s manually controlled descent propulsion motor to make a perfectly timed, 14 second correction in mid-flight. This enabled them to successfully re-enter earth's atmosphere, allowing both the watch that saved them and the astronauts to indelibly be inked into one the most extraordinary moments in human history."

In 1968, Omega introduced the ST 145.022 reference ST, which was the first time that the Rolex GMT-Master II Replica received the calibre 861. This changed from the older column wheel chronograph system to a shuttle cam system. This effectively ended the 25-year-long reign of calibre 321.

1992 -- Jubilee 27 CHRO C12 Refer BA 148.0052. First COSC Certified ManualWound Rolex GMT-Master II Replica

1992 Jubilee 27 CHRO C12 Refer BA 148.0052 First COSC Certified Manual Wound Rolex GMT-Master II Replica (Image by (c)Revolution).

Omega decided to celebrate the 50th anniversary of calibre 321 with a special watch,Rolex GMT-Master II Replica and another special movement. This was the 1992 Jubilee 27 CHROC12 Rolex GMT-Master II Replica. This is why the BA148.0052 is an important piece in Rolex GMT-Master II Replica's timeline. This watch was produced in an edition of 999 watches with solid case backs, 250 watches with display backs, and a special presentation box.