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Alpina 274
Basic Information
| Name | Alpina 274 |
|---|---|
| Alternative Name | Unitas 32 |
| Base Calibre | Unitas 32 |
| Manufacturer | Alpina |
| Launch Year | 1925 |
| Caliber Family | Description 273, 6525: open face, H= 5.3mm 273, 274: hunter, H= 5.3mm 277, 6521: open face, H= 4.15mm 277, 278: hunter, H= 4.15mm suffix A: meaning not known Related calibers Alpina 273 hunter, Alpina 273 new, Alpina 273 open face, Alpina 273A hunter, Alpina 273A open face, Alpina 274, Alpina 277 hunter, Alpina 277 open face, Alpina 277A hunter, Alpina 277A open face, Alpina 278, Alpina 6521, Alpina 6525 |
| 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 | 18.5 ‴ |
|---|---|
| Dimensions | 41.65 mm |
| Height | 5.3 mm |
| Further Measures | Mounting Diameter (Dm): 41.1mm Winding Gear: 0.1mm Stem height (T): 2.3mm Mounting Height (F): 0.65mm |
| Power Reserve | 33 hours |
| Frequency | 18,000 vph |
| Jewels | 15 |
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 | 2.00 x 1.15 / 0.26mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: hunter calibre attention: probably left handed ratchet-wheel screw differences not known between hunter 273, 274 Other data: balance staff: U1161 stem: W1681 mainspring / battery: Zf3575, 2.10 x 16.5 x 0.20 x 490mm (catalogues) Zf3568, 2.10 x 16.0 x 0.20 x 460mm (measured) Mainspring: 2.100 x 16.000 x 0.195 x 500.000 mm |
| Signature | ca. 1925: A, 273A - 330315 (Alpina 273A) |
Compatible Parts
No parts linked yet for this caliber.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:41 AM |
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