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Hamilton 15 Chronomatic
Basic Information
| Name | Hamilton 15 Chronomatic |
|---|---|
| Alternative Name | Buren 1281 |
| Base Calibre | Buren 1281 |
| Manufacturer | Hamilton |
| Launch Year | 1969 |
| Caliber Family | Description 11: 19800 A/h 12: 21600 A/h 15: sub second instead of 12h-counter Related calibers Hamilton 11 Chronomatic, Hamilton 12 Chronomatic, Hamilton 15 Chronomatic |
| Is COSC certified | Yes |
Timegrapher
Beat rate
21,600 bph
Frequency
3 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 13.75 ‴ |
|---|---|
| Dimensions | 31.02 mm |
| Height | 7.7 mm |
| Further Measures | Mounting Diameter (Dm): 31mm |
| Power Reserve | 42 hours |
| Frequency | 21,600 vph |
| Jewels | 17 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Automatic |
| Rotor Type | Micro-Rotor |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Automatic (Rotor-Driven) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | (not set) |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1969- joint development of Hamilton-Buren, Breitling and Heuer module Dubois-Depraz 8510 on modified Buren 1281 crown at 9h micro rotor double excenter regulator for curb pins and stud carrier indirectly driven minute allows a low profile (details cf. Buren 1320) Other data: balance staff: U3426 stem: W3398 mainspring / battery: 1.60 x 10.5 x 0.105mm |
| Signature | 1974: Heuer, Swiss, 17 Jewels; Incabloc (Heuer 15) |
| Import Codes |
|
Compatible Parts
728 other caliber(s) share compatible parts with this caliber.
79 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:50 AM |
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