Calibre record · Manual chronograph
Omega calibre 861 / 1861
Documented
Simpler and cheaper to produce than the 321; the 1861 is a rhodium-plated revision with an extra jewel.
- Manufacturer
- Omega
- Type
- Manual chronograph
- Winding
- Manual
- Production
- 1968–1996 (861); 1996–2019 (1861)
- Country
- Switzerland
- Diameter
- 27 mm (12 lignes)
- Height
- 6.87 mm
- Jewels
- 17 (861); 18 (1861)
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- c. 45 h
- Oscillator / escapement
- Detached lever escapement
- Complications
- Cam-lever chronograph (30-minute, 12-hour counters)
Figures are those commonly published for the standard version; individual versions and grades differ. “Undocumented here” means the value has not yet been confirmed for this record.
