Discuss calibers, share photos, and improve our database together on Discord
Join Community
Updates to data and images are welcome from our readers.
ETA 725
Basic Information
| Name | ETA 725 |
|---|---|
| Manufacturer | ETA |
| Launch Year | 1940 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 8.75 ‴ x 12 ‴ |
|---|---|
| Dimensions | 19.95 mm x 26.5 mm |
| Height | (not set) |
| Further Measures | Mounting Diameter (Dm): 19.95 x 26.5mm Stem height (T): 1.7mm Mounting Height (F): 0.5mm |
| Power Reserve | 43 hours |
| Frequency | 18,000 vph |
| Jewels | 16 |
Complications and Specifications
| Shape | Barrel (Tonneau) |
|---|---|
| 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 0.65mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | (not set) |
| Notes | Other data: balance staff:
U72
stem:
W140
mainspring / battery:
Zf877, 1.30 x 10.5 x 0.12 x 320mm
balance staff ronda: 844 (8,75 x 12) stem ronda: 11 (8,75 x 12)
Mainspring: 1.300 x 10.000 x 0.120 x 320.000 mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 16 |
| Signature | ca. 1940: - ETA (ETA 717, sub second) |
| Import Codes |
|
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:13 PM |
Loading...