Wikipedia
Bolex (Bolex International S.A. of Yverdon) is a Swiss manufacturer of motion picture cameras and lenses, the most notable products of which are in the 16 mm and Super 16 mm formats. The Bolex company was founded by Jacques Bogopolsky (a.k.a. Bolsey or Bolsky) in 1927 and Bolex is derived from his name. He had previously designed cameras for Alpa. Bolex cameras were particularly important for early television news, nature films, documentaries and the avant garde, and are still favoured by many animators. While some later models are electrically powered, the majority of those manufactured since the 1930s use a spring-wound clockwork power system. The 16 mm spring-wound Bolex is a popular introductory camera in film schools.
Bolex no longer manufactures its cameras in series, but produces 16mm and Super 16 cameras for customers on special order.