Hymm, the seller is a well known honest dealer here in Poland. He says this ring come in a lot of souvenirs belonging to prisoner of KL Auschwitz (political prosoner). Ring belonged to one of the guard in this camp. The badge it is badge of former political prisoners of german concentration camps (existing 1946 - 1949). Seller gives timeless guarantee on this ring. It is made of white metal (alpaca or silver). This is what I know.