|Diameter:||39.30 mm (17.67 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph|
|Production: 1916 –|
Valjoux Cal. 25 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.