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Hamilton 703
Basic Information
| Name | Hamilton 703 |
|---|---|
| Alternative Name | ETA-ESA 9154 |
| Base Calibre | ETA-ESA 9154 |
| Manufacturer | Hamilton |
| Launch Year | 1970 |
| Is COSC certified | No |
Timegrapher
Beat rate
28,800 bph
Frequency
4 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 12.5 ‴ |
|---|---|
| Dimensions | 28.2 mm |
| Height | 5.55 mm |
| Further Measures | Mounting Diameter (Dm): 28.0mm |
| Power Reserve | (not set) |
| Frequency | 28,800 vph |
| Jewels | 13 |
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, electronic control |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.50 x 0.90 x 0.22mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1970-1975 Other data: stem: ESA 9154 mainspring / battery: 343 (original, mercury), 344 (replacement, silver odixe) |
| Signature | ca. 1970: Lic ATO, Buttes Watch Co, Swiss, 13 Jewels; Incabloc (ETA-ESA 9154) |
| Import Codes |
|
Compatible Parts
20 other caliber(s) share compatible parts with this caliber.
51 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:51 AM |
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