- Brand: OMEGA
- Year: 1966
- Model: Chronograph
- Reference: 101.010
- Calibre: 321
- Movement: Manual
- Material: 18ct yellow gold
- Features/complications: Square chronograph pushers
- Dial: Brushed silvered dial with outer tachymetre and minute track with strokes to 1/5th of a second, faceted and polished baton hour indices, subsidiary seconds at 9 o’clock, 30 minute register at 3 o’clock, 12 hour register at 6 o’clock with baton hands with central chronograph seconds
- Case Dimensions: 35 mm
- Bracelet/strap: Leather strap
- Accessories: Extract from the Archives
- Web reference: 02739
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 a number of space bound Speedmaster models that went to the moon