I have two versions of this item, one perforate and one imperforate. I searched Colnect via image search (it didn't like that), using terms "Dachau," "Allach," "Dachau-Allach," and "Polish Red Cross." Without success. I also manually searched the Polish catalog, including the Cinderella, Private, and Illegal sections and am unable to find it. I have found an article about a closely related item in the Collectors' Forum in Linn's Stamp News from May 8, 1995. The article describes a sheet with a single stamp. I presume this was part of a series. Regardless, they were sold to raise funds for the Red Cross. I am seeking assistance with a catalog listing and any additional information.
thank you in advance
Henry