|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|
Clockwise Balance Cock
|Production: 1916 – 1970|
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.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.