Discuss calibers, share photos, and improve our database together on Discord
Join Community
Updates to data and images are welcome from our readers.
ETA 1131
Basic Information
| Name | ETA 1131 |
|---|---|
| Manufacturer | ETA |
| Launch Year | 1950 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 13 ‴ |
|---|---|
| Dimensions | 29.4 mm |
| Height | 3.5 mm |
| Further Measures | Mounting Diameter (Dm): 29.0mm Mounting Height (F): 0.8mm |
| Power Reserve | 43 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
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 | 1.50 x 0.80 / 0.21mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: like 1130, just bigger base plate signature on dial side often or always 1120 differences not known between 1121, 1123, 1125, 1127, 1129, 1131, 1133, 1139, 1289 Other data: balance staff: U1423 stem: W1130 mainspring / battery: Zf1246, 1.50 x 10.5 x 0.13 x 300mm balance staff ronda: 835 (12-13) stem ronda: 61 (12-13) Mainspring: 1.500 x 10.500 x 0.130 x 320.000 mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 17 |
| Signature | ca. 1950: Eska Watch Co, Swiss, 17 Jewels - ETA 1120; Incabloc (ETA 1121) |
| Import Codes |
|
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:05 PM |
Loading...