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Alpina 840
Basic Information
| Name | Alpina 840 |
|---|---|
| Alternative Name | AS 954 |
| Base Calibre | AS 954 |
| Manufacturer | Alpina |
| Launch Year | 1935 |
| 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 | 8.75 ‴ x 12 ‴ |
|---|---|
| Dimensions | 19.74 mm x 27.07 mm |
| Height | 4.2 mm |
| Further Measures | Mounting Diameter (Dm): 19.8 x 26.6mm |
| Power Reserve | 46 hours |
| Frequency | 18,000 vph |
| Jewels | 15 |
Complications and Specifications
| Shape | Barrel (Tonneau) |
|---|---|
| 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 | 1.45 x 0.80 / 0.20mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: brand: Novice ratchet on dial side, crown mechanism with rocker bar Other data: balance staff: U754 stem: W754 mainspring / battery: Zf1323, 1.60 x 10.0 x 0.11 x 320mm |
| Signature | ca. 1935: 3 - AS 954 (AS 954) |
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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