Fortis is a Swiss watch manufacturer known for rugged, purpose-built tool watches made for aviation, diving, and space exploration. Established in 1912, Fortis has a long record of reliable timepieces with clear legibility and robust construction. It was one of the first to mass-produce automatic wristwatches, and later became known for space-tested watches, officially worn by Russian cosmonauts aboard missions to the Mir Space Station and the International Space Station. Built to perform under extreme conditions, Fortis watches emphasize practicality, precision, and endurance, which has earned them a loyal following among pilots, divers, and explorers. The range runs from the utilitarian Flieger collection to the more technical Cosmonauts and Stratoliner series. Each Fortis watch is built on Swiss engineering made for the skies, seas, and beyond.