Valjoux

It is known primarily for chronograph ébauche movements that are used in a number of mid- to high-range mechanical watches.

[1] The Valjoux 7750 is different from most other chronograph movements, using the three-plane cam system rather than the column wheel.

Levers push a cam back and forth, driving the stopwatch mechanism of the Valjoux 7750.

In the 1980s, many companies began using the Valjoux 7750 because it was easier to mass-produce and distribute in high volume.

These include ETA's own Valgranges, designed for larger watches, as well as the following third-party movements:

ETA/Valjoux 7750 (photo 2009)
Chart of historic Valjoux movements