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Gruen 107
Basic Information
| Name | Gruen 107 |
|---|---|
| Manufacturer | Gruen |
| Launch Year | 1927 |
| Caliber Family | Description 106, 107: 15 jewels, bimetallic balance 1067, 1077: 17 jewels, bimetallic balance 306: 17 jewels, monometallic balance Related calibers Gruen 106, Gruen 1067, Gruen 107, Gruen 1077, Gruen 306 |
| Is COSC certified | No |
Timegrapher
Beat rate
20,160 bph
Frequency
2.8 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 5.75 ‴ x 8.5 ‴ |
|---|---|
| Dimensions | 12.85 mm x 19.7 mm |
| Height | 3.4 mm |
| Further Measures | Mounting Diameter (Dm): 12.85 x 19.2mm Stem height (T): 1.5mm Mounting Height (F): 0.3mm |
| Power Reserve | 40 hours |
| Frequency | 20,160 vph |
| Jewels | 15 |
Complications and Specifications
| Shape | Rectangle |
|---|---|
| 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 0.90 x 0.20mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1927- *) Flume lists the frequencies 18000 and 20160 A/h, but in Gruen catalogs an according remark is missing. bimetallic screw balance, Breguet hairspring signature often or always Gruen 106 differences not known between 1067, 1077 probably designations for different base-plate shapes, round corners (Fig.1, 2) or octogonal Other data: balance staff: U1964 stem: W2077 mainspring / battery: Zf477, 1.10 x 7.0 x 0.09 x 190mm balance staff ronda: 1133 (5,25 x 8,5) stem ronda: 548 (5,25 x 8,5) Mainspring: 1.100 x 7.000 x 0.090 x 220.000 mm |
| Signature | ca. 1930: 106, 695647, Gruen Watch Co, Precision, Switzerland, Swiss, 17 Jewels - 695647, Pat. (Gruen 1067) |
Compatible Parts
12 other caliber(s) share compatible parts with this caliber.
6 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:50 PM |
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