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Omega R17.8
Basic Information
| Name | Omega R17.8 |
|---|---|
| Manufacturer | Omega |
| Launch Year | 1939 |
| Caliber Family | Description R17.8: sub second R17.8AM: sub second, antimagnetic R17.8SC: sweep second R17.8SC AM: sweep second, antimagnetic Related calibers Omega R17.8, Omega R17.8AM, Omega R17.8SC, Omega R17.8SC AM |
| Is COSC certified | No |
Timegrapher
Beat rate
21,600 bph
Frequency
3 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 10.5 ‴ |
|---|---|
| Dimensions | 17.8 mm x 22 mm |
| Height | 3.25 mm |
| Further Measures | Mounting Diameter (Dm): 17.8 x 22.0mm |
| Power Reserve | 45 hours |
| Frequency | 21,600 vph |
| Jewels | 17 |
Complications and Specifications
| Shape | Rectangle |
|---|---|
| Complications |
|
| 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 | 1.10 x 0.65 / 0.15mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1939-1949 bimetallic screw balance Other data: balance staff: U1249 stem: W1040 mainspring / battery: Zf673, 1.2 x 8.0 x 0.10 x 230mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 17 |
| Signature | 1939: 9163912, M, Omega Swiss, 15 Jewels |
| Import Codes |
Compatible Parts
127 other caliber(s) share compatible parts with this caliber.
59 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:33:41 PM |
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