The Werra is a series of 35mm viewfinder or rangefinder cameras manufactured by the Carl Zeiss Jena factory, which was primarily a lens factory. The Werra is named after a small German river.
The cameras offer a high degree of control with a minimum number of levers, buttons or rings. In their simplest form, the Werras only had a shutter button on the top plate. With its streamlined design you could call the Werras a design camera. Almost all other controls were incorporated into the lens barrel.
Jena lens 1:2.8 50 mm with number 6195998