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Zenith 50.5
Basic Information
| Name | Zenith 50.5 |
|---|---|
| Alternative Name | ETA-ESA 9164 |
| Base Calibre | ETA-ESA 9164 |
| Manufacturer | Zenith |
| Launch Year | 1969 |
| Caliber Family | Description 50.0: date 50.5: day, date Related calibers Zenith 50.0, Zenith 50.5 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 13 ‴ |
|---|---|
| Dimensions | 29.4 mm |
| Height | 5.55 mm |
| Further Measures | Mounting Diameter (Dm): 29.0mm Stem height (T): 2.6mm Mounting Height (F): 2.0mm |
| Power Reserve | (not set) |
| Frequency | 300 vph |
| Jewels | 12 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Electromechanical |
| Escapement Type | Swiss Lever |
| Control Type | Tuning Fork |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.50 x 0.90 x 0.25mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1969- Other data: stem: ESA 9162 mainspring / battery: 343 (original, mercury), 344 (replacement, silver odixe) |
| Signature | 1970: 7058237, ESA 9164, 22, 22 Y2, Eterna Sonic 1551, Lic. Bulova & Pat. ESA Swiss, 12 Jewels (Eterna 1551, ETA-ESA 9164) |
| Import Codes |
|
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:57 AM |
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