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.