HISTORY OF LEONIDAS WATCHES
Leonidas became a leader in wrist chronographs and aviation/military timing instruments. It supplied precision pieces for Italian aviation (including Balbo’s long-distance flights in the early 1930s), produced water-resistant models from the mid-1930s, and made chronographs with hour counters by 1939. For its 1941 centenary it introduced observatory-tested chronometers. Post-WWII, it offered gold and other fine chronographs (often using Valjoux, Landeron, Venus, or similar ébauches), calendar models, and more.
• Merger and end of the brand: In 1964 it merged with Heuer (another Saint-Imier chronograph specialist) to form Heuer-Leonidas, then the largest Swiss maker of stopwatches and chronographs. The Leonidas name was used sparingly afterward. After further ownership changes amid the quartz crisis, the brand was retired when the company became TAG Heuer in 1985. (A modern revival exists but is separate from the historic production.)
