This is an attractive folding 129 rollfilm size camera by Krauss, Stuttgart
It has a Compur Shutter which works on all speed, though a little slowly on the slow speeds.
Accuracy cannot be guaranteed.
The Lens is a Jos Schneider &co. Kreuznach Xenar f4.5 7.5cm
Unusual camera in the less common 129 film format, but there is no film spool with this camera