Valjoux 7736 driving pinion 8630

Valjoux

Valjoux is a historic Swiss movement manufacturer best known for its legendary mechanical chronograph calibres. Founded in the early 20th century in the Vallée de Joux, Valjoux produced reliable and widely used movements for many respected watch brands, including Heuer, Breitling, Rolex, Omega, and many others. Its calibres, such as the Valjoux 72 and Valjoux 7750, are admired for their durability, serviceability, and important role in the development of modern chronograph watches.

Pinion

A pinion is a small toothed gear component used throughout a watch movement to transfer motion and power between wheels. Pinions are essential for the gear train, winding system, setting mechanism, and other functions. They may be replaced when teeth, pivots, leaves, or friction surfaces are worn, broken, corroded, or causing poor movement performance.