|Diameter:||39.30 mm (17.67 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph|
|Production: 1945 –|
Valjoux Cal. 54 is a pocket watch column wheel chronograph movement. Introduced around 1945, 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 a 30 minute counter. It was a single-pusher design.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.