Valjoux Watch Co: A Pillar of Swiss Chronograph Movement Excellence

Valjoux is a celebrated Swiss manufacturer specializing in mechanical chronograph watch movements, with a legacy dating back to 1901. Founded by brothers John and Charles Reymond in Les Bioux, Switzerland, the company has played a critical role in the development and supply of reliable chronograph calibers for over a century.
Key Highlights

Founding and Early Development

Established in 1901 as Reymond Frères SA, the company specialized early on in chronograph movements. In 1929, it rebranded as Valjoux SA, named after the Vallée de Joux (Joux Valley), a renowned watchmaking region.

Initially focused on producing chronograph watch parts and complete calibers, supplying mainly military and sports markets during the early 20th century.

Iconic Chronograph Movements

Valjoux gained renown for its column-wheel chronograph calibers, notably Calibre 22 (introduced in 1914) and Calibre 23 (introduced circa 1916), which powered vintage wristwatches from prestigious brands including Audemars Piguet, Patek Philippe, Rolex, and Vacheron Constantin for nearly six decades.

The robust Calibre 23, measuring approximately 29.33 mm in diameter, produced around 125,000 units until 1974, becoming a benchmark for quality mechanical chronographs.

Influence and Industry Status

During the mid-20th century and beyond, Valjoux became synonymous with reliable, precise chronograph movements.

Valjoux movements powered military chronographs used extensively in World War I and II, cementing their reputation for toughness and accuracy.

The Legendary Valjoux 7750

Launched in 1973, the Valjoux 7750 is one of the most famous automatic chronograph movements in watchmaking history. Robust and versatile, it features a 12-hour counter, date function, and small seconds, and remains widely used today under ETA’s production after integration into the Swatch Group.

The 7750’s modular, easy-to-service design revitalized mechanical chronographs after the quartz crisis, becoming a staple for many mid- and high-range watches globally.

Corporate Evolution

Valjoux joined Ebauches SA in 1944 and later was absorbed into ETA, making it part of the Swatch Group, the largest watch conglomerate worldwide.

Despite mergers, Valjoux calibers continue to be highly regarded and manufactured, with modifications and upgraded versions servicing modern horology needs.

Summary

Valjoux Watch Co’s contributions have been foundational in Swiss chronograph excellence. From early 20th-century column-wheel calibers to the ubiquitous Valjoux 7750 automatic chronograph, the company’s movements power some of the most respected timepieces in the world. Its enduring legacy lies in combining mechanical reliability with functional precision that has shaped the chronograph watch market for over a century.

This article is compiled from authoritative watch history and industry sources to ensure accuracy and completeness.