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Helvetia 871
Basic Information
| Name | Helvetia 871 |
|---|---|
| Alternative Name | ETA 2502 |
| Base Calibre | ETA 2502 |
| Manufacturer | Helvetia |
| Launch Year | 1965 |
| Caliber Family | Description 861: automatic, date 868: automatic 869: auto, date quickset 871: manual wind, date 878: manual wind Related calibers Helvetia 861, Helvetia 868, Helvetia 869, Helvetia 871, Helvetia 878 |
| Is COSC certified | No |
Technical Details
| Lignes Dimensions | 11.5 ‴ |
|---|---|
| Dimensions | 26 mm |
| Height | 3.25 mm |
| Further Measures | Mounting Diameter (Dm): 25.6mm Stem height (T): 1.7mm Mounting Height (F): 1.1mm |
| Power Reserve | 48 hours |
| Frequency | 18,000 vph |
| Jewels | 21 |
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 Wheel |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.50 x 0.90 x 0.21mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: escapement and click from Helvetia Other data: balance staff: U3339 stem: W2919 mainspring / battery: Zf698, 1.20 x 11.0 x 0.12 x 350mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 21 |
| Signature | ca. 1965: Helvetia, Swiss Made, 17 Jewels - 3968, Patented; Incabloc (Helvetia 878) |
| Import Codes |
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:51 AM |
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