Omega 1861
High confidenceThe Moonwatch caliber for a quarter-century, replaced by the Co-Axial 3861. Its start year depends on the unresolved 861 changeover date and should be read as approximate.
Specifications
- Movement manufacturer
- Omega
- Base caliber
- Lemania 1873
- Production
- 1996–2021
- Frequency
- 21,600 vph (3 Hz)
- Jewels
- 18
- Power reserve
- 48 hours
- Diameter
- 27 mm
- Winding
- manual
- Complications
- Chronograph · Small seconds · 30-minute counter · 12-hour counter
Architecture
The 861 with rhodium-plated components in place of the earlier copper-coloured finish.
Related calibers
Preceded by
Omega 861Related caliber
Omega 1863Decorated execution for display-back references.
Succeeded by
Omega 3861Built on
Lemania 1873
References using this caliber
- Omega 145.022Service
Speedmaster · Whole production
- Omega 145.022Factory
Speedmaster · 1996 →
Provenance of this record
Sources & Evidence
Secondary sourceSpecialist publication
Goldberger, John — Omega Speedmaster (Moonwatch Only)
Mondani Editore / La Sirène
- Published
- 2014-01-01
Cited for
This referenceHigh confidence
Last verified: Not yet reviewed