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Omega 861
Basic Information
| Name | Omega 861 |
|---|---|
| Alternative Name | Lemania 1873 |
| Base Calibre | Lemania 1873 |
| Manufacturer | Omega |
| Launch Year | 1968 |
| Caliber Family | Description 860: 17 jewels, base calibre 861: 17 Steine, 12h counter 862: 21 jewels, 12h counter 863: like 862, jubilee edition 864: like 862, jubilee chronometer 865: like 860, only 60s-counter 866: like 861, date, moon phase 867: like 862, jubilee chronometer, skelettonized 910: like 861, 2nd time zone, 24h display 911: like 861, 2nd time zone 920: like 860, only 60s-counter, date 930: like 860, date Related calibers Omega 860, Omega 861, Omega 862, Omega 863, Omega 864, Omega 865, Omega 866, Omega 867, Omega 910, Omega 911, Omega 920, Omega 930 |
| Is in house development | No |
| Is COSC certified | Yes |
Timegrapher
Beat rate
21,600 bph
Frequency
3 Hz
Lift angle
50 degrees
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 12 ‴ |
|---|---|
| Dimensions | 27.07 mm |
| Height | 6.87 mm |
| Further Measures | Mounting Diameter (Dm): 27.0mm |
| Power Reserve | 40 hours |
| Frequency | 21,600 vph |
| Jewels | 17 |
| Lift Angle | 50 degrees |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Manual |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1968- , 500000 (1968-1996) 1968-1992 pink gold plated 1992-1996 yellow gold plated 1996-today rhodium plated Other data: balance staff: U3245 stem ronda: 909 (12) |
| Signature | 1971: 31005939, Omega Swiss, 17 Jewels; Incabloc |
| Import Codes |
Compatible Parts
1269 other caliber(s) share compatible parts with this caliber.
190 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:55 AM |
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