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