WW2 German Military note, Bill 10 REICHSPFENNIG. These bills are not extremely rare. But this is the only one I ever came across which is stamped on the back with a stamp of the 3rd Totenkopf Division of the Waffen SS.

Very rare. 100% Original. On the 3rd picture you can see the watermark inside the bill when holding it to the light. In very good condition, minor folding.