Valjoux 24 KV

	Brand:	Valjoux
	Family:	Unknown
	Height:	7.45 mm
	Jewels:	15, 17
	Reserve:	32 hours
	Frequency:	18,000 A/h
	Winding:	Hand winding
	Diameter:	43.0 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 Split Second Chronograph Hand, Small Seconds Hand at 9:00

Distinguishing Technical Characteristics
Hand-Winding Clockwise Balance Cock 6-Column Chronograph
Production: 1916 – 1970
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

Valjoux Cal. 24 KV (“Chronograph Valjoux”) is a pocket watch column wheel chronograph movement. Introduced around 1916, it was produced until 1970. It featured a six-column wheel to control the chronograph function. The chronograph used a central seconds hand with optional split seconds and a 30 minute counter. It was a single-pusher design.

The Valjoux 19 ligne family of pocketwatch chronograph movements from Reymond Frères SA of Les Bioux, Switzerland includes many variations. The basic version (5 KVM or 551) uses a single pusher, while Cal. 5 2F has a separate reset pusher. There is also Cal. 9 KVR, with a rattrapante hand, and Cal. 24 KV, a simple timer. Many are commonly called Valjoux Calibre 19”’, as was common at the time.

• Valjoux 5 KVM – Standard version (also called Cal. 551)
• Valjoux 5 2F – Separate reset pusher
• Valjoux 8 KL
• Valjoux 9 KVR – Split seconds (“Rattrapante”)
• Valjoux 24 KV – Timer, split seconds
• Valjoux 555 – Flyback version
• Valjoux 62 KVC – Timer
• Valjoux 75 KVMR – Timer, with forward and reverse 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.