Need a part for this caliber? Supporters unlock the parts catalog, factory equivalents, and the donor finder that shows which other movements can supply the part you need.
Become a Supporter
Updates to data and images are welcome from our readers.
Hamilton 770
Basic Information
| Name | Hamilton 770 |
|---|---|
| Manufacturer | Hamilton |
| Launch Year | 1955 |
| 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 | 10.5 ‴ |
|---|---|
| Dimensions | 20.4 mm x 21.9 mm |
| Height | 3.8 mm |
| Further Measures | : 12 Mounting Diameter (Dm): 23.2mm Stem height (T): 1.9mm Mounting Height (F): 1.25mm |
| Power Reserve | 45 hours |
| Frequency | 18,000 vph |
| Jewels | 22 |
Complications and Specifications
| Shape | Cushion |
|---|---|
| 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 | 1.28 x 0.65 / 0.18mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | United States |
| Notes | Remarks: Breguet hairspring |
| Signature | ca. 1955: Hamilton 770, U.S.A., Adj., 22 Jewels; Incabloc |
| Import Codes |
|
Compatible Parts
21 other caliber(s) share compatible parts with this caliber.
48 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:56 PM |
Loading...