The Radix camera series was manufactured by the Kurbi & Niggeloh (Bilora) Company of Radevormwald/RHLD, Germany beginning in 1948. There were a number of Radix models produced from 1948 into the 1950's. This 35B (the names comes from the lens type - Biloxar f/3.5) is a compact camera, which takes 24 x 24 mm sized exposures on Karat cassettes.
This camera has an Biloxar Anastigmat 1:3.5 38mm lens and simple shutter. The camera has to be loaded with a cartridge in which the film is provided and an empty cartridge of the same type. The film advance mechanism of the camera transfers the film step by step out of the one into the other cartridge. The piece of film lying inside the camera between the cartridges will always be fixed perfectly in the focal plane. Many years later the Karat cartridges were revived as Agfa's Rapid film system. The good news is that this camera is supplied with two hard-to-find empty cartridges, which could be loaded with modern 35mm within a darkroom.
The camera is in very good cosmetic condition (see photos). The shutter and apertures are working. The camera is also supplied with a vintage leather camera case, which isn't its original one, but has been modified to fit the camera nicely via a handy metal screw-in plate.