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Alpina 687
Basic Information
| Name | Alpina 687 |
|---|---|
| Alternative Name | AS 1287 |
| Base Calibre | AS 1287 |
| Manufacturer | Alpina |
| Launch Year | 1940 |
| 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 | 23.7 mm |
| Height | 4.5 mm |
| Further Measures | Mounting Diameter (Dm): 23.3mm |
| Power Reserve | 40 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| 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 | 1.31 x 0.85 x 0.22mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: brand: Terval Other data: balance staff: U1512 stem: W1149 mainspring / battery: Zf1211, 1.50 x 9.0 x 0.10 x 290mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 17 |
| Signature | ca. 1940: Olma, Swiss Made, 15 Jewels - AS, 1287, 1294, Brevet + Dep. (AS 1287) |
| Import Codes |
Compatible Parts
No parts linked yet for this caliber.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:42 AM |
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