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FEF 250
Basic Information
| Name | FEF 250 |
|---|---|
| Manufacturer | Fabrique d'Ébauches de Fleurier |
| Launch Year | 1965 |
| Caliber Family | Description 250-253, 255, 260: sub second 250-1: sweep second Related calibers FEF 250, FEF 250-1, FEF 251, FEF 252, FEF 253, FEF 255, FEF 260 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 8.75 ‴ |
|---|---|
| Dimensions | 19.7 mm |
| Height | 3.55 mm |
| Further Measures | Mounting Diameter (Dm): 19.4mm Stem height (T): 1.5mm Mounting Height (F): 1.0mm |
| Power Reserve | 47 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
| Lift Angle | 52 degrees |
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 | 1.30 x 0.60mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: differences not known between 250-253, 255, 260 Other data: balance staff: U542 stem: W879 mainspring / battery: Zf1299, 1.60 x 8.0 x 0.08 x 280mm balance staff ronda: 942 (8,75) stem ronda: 24 (8,75) |
| Signature | ca. 1965: Y3, Swiss, 17 Jewels; Incabloc |
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:24 PM |
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