|Diameter:||42.10 mm (19 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph|
|Production: 1946 –|
Valjoux Cal. 57 is a pocket watch column wheel chronograph movement. Introduced around 1946, it was produced at least through the 1940s, possibly exclusively for Heuer. It featured a six-column wheel to control the chronograph function. The chronograph used a central seconds hand with split seconds a 30 minute counter. It was a two-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.