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The Soprod A10.2 is a Swiss‑made automatic mechanical movement introduced in 2004, derived from the Seiko 4L25 platform and refined as a direct alternative to the ETA 2892‑A2. Measuring just 3.6 mm in height (excluding hands), it features 25 jewels, 28,800 vph (4 Hz), a 42‑hour power reserve, hacking seconds, Incabloc shock protection, a Glucydur balance wheel, and a bidirectional ball‑bearing rotor. The base A10‑2 version offers central hours, minutes, hacking seconds and date display.
Ultra‑thin automatic movement – 3.6 mm height, ideal for slim dress watches.
High‑beat precision – 28,800 vph (4 Hz) for smooth seconds sweep and stable rate.
Robust construction – 25 jewels, Incabloc shock protection, Glucydur balance wheel.
Bidirectional winding – Ball‑bearing rotor ensures efficient automatic winding.
Versatile base caliber – Central hours/minutes, hacking seconds, date display (quickset).
| Parameter | Value |
|---|---|
| Manufacturer | Soprod (Swiss) |
| Caliber | A10.2 / M100 (same movement) |
| Type | Automatic mechanical |
| Height | 3.6 mm (excluding hands) |
| Jewels | 25 |
| Beat rate | 28,800 vph (4 Hz) |
| Power reserve | approx. 42 hours |
| Hacking | Yes |
| Shock protection | Incabloc |
| Balance wheel | Glucydur |
| Winding | Bidirectional ball‑bearing rotor |
| Functions | Central hours/minutes/seconds, date |
Direct replacement or upgrade for ETA 2892‑A2 in many microbrand and independent watches (Steinhart, Stowa, Sinn, Junghans).
Ideal for custom watch builds requiring a thin, high‑beat automatic movement with date.
Suitable for dress watches, sports watches, and tool watches where reliability and Swiss provenance are valued.
Q1: Is this a genuine Swiss‑made movement?
Yes, the Soprod A10.2 is manufactured in Switzerland and is a fully Swiss automatic caliber.
Q2: What is the difference between A10.2 and M100?
None – Soprod later re‑designated the A10.2 as the Caliber M100. They are identical movements.
Q3: Is the quality comparable to ETA 2892‑A2?
Yes, the A10.2 was designed as a high‑grade alternative with similar dimensions and performance, and is widely respected for its precision and reliability.
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