Case – 38mm Yellow Gold
Caliber – 12-1140CHR SQ
1140 CHR SQ calibre is based on Lemania 8810, but not the same as Lemania 2310 or CH 27
1140 CHR SQ calibre consists of:
ETA 2890-2 base movement (self-winding, date function)
Dubois Dépraz DD 2020 chronograph module (central seconds, 30-minute and 12-hour counters)
1140 CHR SQ calibre is gold plated and square shaped
1140 CHR SQ calibre is used by some Omega Speedmaster models (e.g. ref. 175.0032)
Lemania 2310 or CH 27 is a different chronograph movement that was:
developed by Albert Gustave Piguet in 1942
considered one of the most beautiful and historically significant chronograph movements
featured a column wheel, a horizontal clutch, and a Breguet overcoil balance spring
had a frequency of 18,000 vibrations per hour and a power reserve of 48 hours
had a central seconds, a 30-minute counter, and a small seconds subdial
did not have a date function or an hour counter
used by many prestigious watch brands (e.g. Patek Philippe, Vacheron Constantin, Breguet, Audemars Piguet)
the base movement for the famous Omega calibre 321 (the first Omega Speedmaster that went to the moon in 1969)
Dated – 1992
