- Handwind column wheel chronograph

- 17 jewels

- 3 subdials (up to 12hr record)

- Found in '70s Gallet MultiChron Pilot

Ranfft Database

- 14 ligne

-18,000 beats per hour

- 17 jewels

- Found in 1970's Aero Watch pocket watch

Ranfft database

- 14 ligne

- 18,000 beats per hour

- 17 jewels

- Found in circa 1970 Wakmann

Ranfft database