Beier-Flex
Beier-Flex is a medium format SLR camera made by Beier and introduced in 1938.
It takes 6x6cm frames on 120 film. There are optional adapters for 4.5x6cm plates and 6x6cm sheet film and interchangeable lenses up to 400mm. Standard lens is Xenar 75mm f/3.5, but it offered with Radionar and Victar lenses also.. It has a focal plane shutter. [1]
There are two models:
Beier-Flex I with speeds 1/25-1/500, and Beier-Flex II with speeds 2-1/500.