Bolta was a German camera manufacturer operating from the 1930's to 1957. Just after WWII a range of high quality sub miniature cameras were produced that were using 35 mm film in proprietary cassettes. This later Photavit V from 1950 with high quality coated Xenar 2,8/37,5 mm lens in Synchro-Compur shutter is a nice example. The shutter seems to be fairly accurate but has not been tested with film so the camera is sold as not working. There are 2 Photavit cassettes that come with the camera. Cosmetically, the camera is in a very nice and clean condition, please check the pictures as they form part of the description. SN 28142.
Do check my other auctions, I have for instance a few very nice vintage cameras for sale.