The story
Beneš-Mráz was established at Choceň by Pavel Beneš and Jaroslav Mráz on 1 Apr 1935 and manufactured a series of light aircraft of their own design until the Nazi-German occupation. In 1939/40, the company was renamed Ing. J. Mráz, továrna na letadla - Ing. J. Mráz, Flugzeugfabrik. During the war, the factory was used to produce Fieseler Fi 156 "Storch"s and DFS Kranich training gliders for the German Luftwaffe. Following the war, the company was reconstituted as Ing. J. Mráz, továrna na letadla, národní správa.
From Wikipedia’s article on Beneš-Mráz, shared under CC BY-SA 4.0.3