|Diameter:||43.0 mm (19 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph|
|Production: 1910 –|
Valjoux Cal. 2 was a pocket watch column wheel chronograph movement. Introduced in 1910, it was produced through at least the 1920s. It featured a six-column wheel to control the chronograph function. The chronograph used a central seconds hand with split seconds as well as a 30 minute counter.