|Diameter:||39.30 mm (17 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph|
|Production: 1932 – 1963|
Valjoux Cal. 61 is a pocket watch column wheel chronograph movement. Introduced around 1932, it was produced through the 1963. It featured a six-column wheel to control the chronograph function. The chronograph used a central seconds hand with a 30 minute counter. It was a mono-pusher design.