Gruen 101 (FHF Robert 8.75" )
Mechanical
c. 1915
No photos yet
Notes
1915-
differences not known between 100, 101, 620...623, 626, 627
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.
Dimensions
| Width | 19.4 lignes (43.76 mm) |
|---|---|
| Height | 3.25 mm |
| Stem height | 0.4 mm |
| Hands (H × M × S) | 1.3 × 0.6 × ? mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 34 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 7.5 mm |
| Thickness | 0.1 mm |
| Length | 215 mm |
| Barrel diameter | 1.15 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Gruen |
| Year | c. 1915 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions