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ETA 870
Basic Information
| Name | ETA 870 |
|---|---|
| Manufacturer | ETA |
| Launch Year | 1935 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 8 ‴ x 9 ‴ |
|---|---|
| Dimensions | 18.05 mm x 20.3 mm |
| Height | 3.6 mm |
| Further Measures | Mounting Diameter (Dm): 18.6 x 20.8mm |
| Power Reserve | 44 hours |
| Frequency | 18,000 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 | 1.20 x 0.65 / 0.15mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: bimetallic screw balance differences not known between 865, 868, 870, 874 871 with indirect sweep second Other data: balance staff: U1713 stem: W2067 mainspring / battery: Zf1202, 1.50 x 8.5 x 0.09 x 280mm balance staff ronda: 812 (8 x 9) stem ronda: 163 (8 x 9) Mainspring: 1.500 x 8.500 x 0.095 x 280.000 mm |
| Signature | ca. 1935: GXI, 25236, Gotham Watch Co Inc, XMLK, Swiss, 17 Jewels - ETA (ETA 865) |
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Feb 9, 2024, 6:08:45 PM |
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