|Diameter:||43.0 mm (19 ligne)|
|Complications:||6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph|
|Hands:||30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00|
|Distinguishing Technical Characteristics|
Counter-Clockwise Balance Cock
|Production: 1910 –|
Valjoux Cal. 1 was a pocket watch column wheel chronograph movement. Introduced in 1910, it was produced through at least the 1920s. A monopusher movement, it featured an unusual six-column wheel with asymmetrical columns to control the chronograph function.
This is a “lépine” pocketwatch movement, with the small seconds placed on the same axis as the winding crown. In a pocketwatch, this would place the small seconds at 6:00 with the winding crown at 12:00. The image above would show its placement in a wristwatch, with the winding crown at 3:00 and the small seconds at 9:00.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.