Valjoux 23/72 yoke spring 440

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.

Spring

Springs are used throughout a watch movement to provide tension, return force, indexing, or stored energy for different mechanisms. They can be found in winding systems, setting mechanisms, chronographs, calendars, and other functions. Watch springs are commonly replaced when weak, bent, broken, corroded, or no longer providing the correct pressure for reliable operation.