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Felsa 4121
Basic Information
| Name | Felsa 4121 |
|---|---|
| Manufacturer | Felsa |
| Launch Year | 1960 |
| Caliber Family | Description 18000 / 21600 A/h respectively: 4020/4120: not bevelled 4021/4121: baseplate bevelled 4022/4122: baseplate and bridges bevelled 4023/4123: details not known 4024/4124: date, bridges plane 4025/4125: date, bridges bevelled 4027/4126: details not known 4028/4128: date, further details not known -- /4130: balance, crown mechanism new Related calibers Felsa 4020, Felsa 4021, Felsa 4022, Felsa 4023, Felsa 4024, Felsa 4025, Felsa 4027, Felsa 4028, Felsa 4120, Felsa 4121, Felsa 4122, Felsa 4123, Felsa 4124, Felsa 4125, Felsa 4126, Felsa 4128, Felsa 4130 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 7.75 ‴ |
|---|---|
| Dimensions | 17.5 mm |
| Height | 2.85 mm |
| Further Measures | Mounting Diameter (Dm): 17.2mm Stem height (T): 1.35mm Mounting Height (F): 0.9mm |
| Power Reserve | 43 hours |
| Frequency | 21,600 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 | 1.20 x 0.60mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Other data: balance staff: U2530 / U3123 balance with/without screws stem: W2582 mainspring / battery: Zf729, 1.25 x 6.5 x 0.07 x 210mm stem ronda: 1229 (7,75) Mainspring: 1.200 x 6.500 x 0.075 x 220.000 mm |
| Signature | ca. 1960: IP, Milus 742, Swiss, 17 Jewels; Incabloc (Felsa 4122) |
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:31 PM |
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