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Brand: | Valjoux | 
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|---|---|---|---|
| Family: | |||
| Height: | 7.45 mm | ||
| Jewels: | 17 | ||
| Reserve: | 32 hours | ||
| Frequency: | 18,000 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 39.30 mm (17.675 ligne) | ||
| Complications: | 6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph | ||
| Hands: | 30 Minute Chronograph Hand at 3:00, Central Split Second Chronograph Hand, Small Seconds Hand at 9:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Clockwise Balance Cock  6-Column Chronograph |
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| Production: 1916 – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Valjoux Cal. 25 SRV is a pocket watch column wheel chronograph movement. Introduced around 1916, it was produced at least through the 1940s. It featured a six-column wheel to control the chronograph function. The chronograph used a central seconds hand with optional split seconds and a 30 minute counter. It was a single-pusher design.
One unusual aspect of Cal. 25 was the presence of two column wheels, one of the back of the movement and another on the dial side.
This is a “lépine” pocketwatch movement, with the small seconds placed on the same axis as the winding crown. In a pocketwatch, this would place the small seconds at 6:00 with the winding crown at 12:00. The image above would show its placement in a wristwatch, with the winding crown at 3:00 and the small seconds at 9:00.
- Cal. 25 SRV – Rattrapante
- Cal. 26 – Rattrapante
- Cal. 54 VB
- Cal. 55 VBR – Rattrapante
- Cal. 61 VBB