Valjoux 57

	Brand:	Valjoux
	Family:	Unknown
	Height:	7.45 mm
	Jewels:	15, 17
	Reserve:	32 hours
	Frequency:	18,000 A/h
	Winding:	Hand winding
	Diameter:	42.10 mm (19 ligne)
	Complications:	6-Column Chronograph, Chronograph, Column Wheel Chronograph, Monopusher Chronograph, Split Seconds Chronograph
	Hands:	30 Minute Chronograph Hand at 3:00, Central Hour Hand, Central Minute Hand, Central Split Second Chronograph Hand, Small Seconds Hand at 9:00

Distinguishing Technical Characteristics
Hand-Winding Clockwise Balance Cock 6-Column Chronograph
Production: 1946 –
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

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.

There were three versions of Cal. 57 produced:

• Valjoux 57 2F – Start/stop/reset using single crown pusher
• Valjoux 57 3F – Separate start/stop button at 1:00
• Valjoux 57 RA – Rattrapante version

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.