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FHF Robert 8"
Basic Information
| Name | FHF Robert 8" |
|---|---|
| Manufacturer | Fabrique d’Horlogerie de Fontainemelon |
| Launch Year | 1925 |
| Is COSC certified | No |
Timegrapher
Beat rate
18,000 bph
Frequency
2.5 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 8 ‴ |
|---|---|
| Dimensions | 18.1 mm |
| Height | 3.25 mm |
| Further Measures | Mounting Diameter (Dm): 17.75mm Stem height (T): 1.5mm Mounting Height (F): 0.4mm |
| Power Reserve | (not set) |
| Frequency | 18,000 vph |
| Jewels | 15 |
Complications and Specifications
| Shape | Round |
|---|---|
| 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 | 1.05 x 0.60mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: FHF ran several factories in Fontainemelon, and one was named after the founders Fabrique Robert. The calibres produced there are recorded in few registers (pretty poor and contradictionary) under names like Font Robert, FF Robert, FHF Robert. Bestfit mentions the Gruen 103 as an FHF Robert 8.75" downsized to 8" . But the example here (from a Wilka Watch) demonstrates, that this size was available right from factory. Obviously the 8.75" calibres Gruen 100, 101, 620...623, 626, 627 are also based on this calibre, and are accordingly listed here, but realiable informations can't be given here. Other data: mainspring / battery: 1.06 x 6.5 x 0.08 x 190mm swiss patent 51482: filed 05-03-1910, FHF, Fabrique d'Horlogerie de Fontainemelon (CH) setting mechanism without setting-lever spring |
| Signature | ca. 1925: - 9686, +51482 |
Compatible Parts
No parts linked yet for this caliber.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:45 PM |
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