Ronda AG was founded in 1946 by William Mosset in Lausen, canton of Basel-Landschaft, Switzerland. The company initially produced watch components for other firms and from 1952 manufactured ébauches under licence for BRAC; by 1961 it had begun producing its own complete movement blanks. Throughout the 1950s Ronda navigated the restrictive Swiss statut horloger, which limited independent movement production. The decision to develop its first quartz movement in 1974 — when most Swiss firms were still betting on mechanical calibers — proved critical to Ronda's survival and ultimate dominance during the quartz crisis of the late 1970s.

Today Ronda AG is one of the world's leading producers of quartz watch movements, manufacturing approximately 20 million calibers annually across facilities in Lausen and Thailand. Its catalogue spans slim dress movements, multi-function chronographs, and speciality modules, and it supplies hundreds of brands worldwide from the fashion segment to mid-range Swiss producers. Collectors of quartz-era watches will encounter Ronda calibers across a huge range of 1980s and 1990s Swiss pieces.

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Manufacturer Movement
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 23.7 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 26 mm
Ronda AG Manual 27 mm
Ronda AG Solar 25.94 mm
Ronda AG Manual 27 mm
Ronda AG Solar 25.94 mm
Ronda AG Manual 27 mm
Ronda AG Manual 27 mm
Ronda AG Manual 27 mm
Ronda AG Manual 27 mm
Ronda AG Manual 27 mm
Ronda AG Manual 27 mm
Ronda AG Manual 30.45 mm
Ronda AG Manual 30.45 mm
Ronda AG Manual 30.45 mm
Ronda AG Quartz 8.46 mm x 13.53 mm