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AS 1250
Basic Information
| Name | AS 1250 |
|---|---|
| Alternative Name | Helbros 62H |
| Manufacturer | AS |
| Launch Year | 1940 |
| Caliber Family | Description 1240, 1256, 1346, 1360, 1453: manual wind, 8.75" 1250: automatic, 11" Related calibers AS 1240, AS 1250, AS 1256, AS 1346, AS 1360, AS 1453 |
| 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 | 11 ‴ |
|---|---|
| Dimensions | 24.8 mm |
| Height | 5.55 mm |
| Further Measures | Mounting Diameter (Dm): 24.8mm Stem height (T): 1.5mm |
| Power Reserve | 32 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Automatic |
| Rotor Type | Hammer (or Bumper) Rotor |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Automatic (Rotor-Driven) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.30 x 0.80 x 0.21mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1940-1953 detached manual wind if 17 jewels, caps for escape wheel It is unknown whether a calender module (day, date, month, moon phase) noticed in Juvenia watches was supplied by AS. Other data: balance staff: U1401 stem: W1138, W1206 mainspring / battery: Zf924, 1.35 x 7.0 x 0.08 x 220mm balance staff ronda: 148 (11,25) stem ronda: 146 (11,5) Mainspring: 1.350 x 7.500 x 0.080 x 220.000 mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 15, 17 |
| Signature | 1-3) ca. 1940: Swiss Made - Brevet +, 1250, AS; Shock-Resist (early sample with bevelled bridges) 4-5) ca. 1945: 8250, Swiss Made, 17 Jewels - Brevet +, 1250, AS; Incabloc |
Compatible Parts
1379 other caliber(s) share compatible parts with this caliber.
145 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | May 26, 2026, 4:43:58 AM |
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