Information
Brand: OMEGA
Year: 1953
Model: Chronograph
Reference: CK 2451
Calibre: 321
Movement: Manual
Material: Stainless steel
Features/complications: Chronograph and round pushers
Dial: Silvered dial with outer tachymetric scale and minute track with strokes to 1/5th of a second featuring gilt applied mirror polished arrow hour indices with gilt baton hands subsidiary seconds at 9 o’clock, 30 minute register at 3 o’clock, 12 hour register at 6 o’clock
Case dimensions: 35mm
Bracelet/strap: Brown leather strap
Accessories: -
SKU: 03383
Essay
The OMEGA calibre 321 was derived from the calibre 27 CHRO C12, which was a chronograph with a 12-hour recorder, developed in 1942. The calibre 321 was the first movement ever used in the OMEGA Speedmaster in 1957 and was used in several space bound Speedmaster models that went to the moon