|Diameter:||43.0 mm (19 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph|
|Production: 1916 – 1970|
Valjoux Cal. 24 is a pocket watch column wheel chronograph movement. Introduced around 1916, it was produced until 1970. 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.