Although I use the name Revue 250 B here, there is no mention of 250 B on the camera itself. However, it is almost identical to the Revue 250 C, the only difference being the connector for flash-cubes on the 250 C instead of the hot shoe on this camera. Since there was a 250 CS (C for Cube, S for Selenium light-meter?) and a 250 BS (combination of hot shoe and light-meter), my guess is that there must have been a 250 B with a hot shoe for flash (B for Blitz?), but without the Selenium light-meter. Foto-Quelle sold this camera in the sixties under the Revue brand, but it was produced by Regula-Werk King KG as part of their Regula line and it is most likely the Regula Sprinty C. The camera takes 35 mm film from an Agfa Rapid cassette.