Rare ZF41 scope marked dym with Feldgrau case marked jvb

Rare ZF41 scope marked dym with Feldgrau case marked jvb. The ZF41 scope is marked dym indicating production by Runge & Kaulfuss, Rathenow which is a very hard maker mark to find. The scope itself needs cleaning because at this moment it is not working. All the lenses are complete and as far as I can judge in undamaged condition. In my opinion there is some internal part loose that is blocking the view at the moment. Regardless a perfect example for a mannequin. The case retains most if not all of its original factory paint and is much harder to find then the tan examples!