Rare and interesting ring that belonged to an inmate of an unknown concentration camp with the number he was given in the camp. This number, the 28703, ins engraved in the ring and then covered with glass ? bacelite alike material. It was very common that former inmates that survived concentration camps wore some mementos or souvenirs that remind them from their days in camps, as a triumph symbol over hell they survived to. Used condition but very nice item directly connected to concentration camps.