Two empty envelopes for letters sent fron KL Ravensbrück in 1942 from 2 different inmates. One was sent by prisoner number  and the other one by prisoner 2459. Both envelopes are complete with stamp and guidelines for female prisoners of the camp, but sadly letters are missing. However it's really intersting since envelopes include all the information of those inmates who wrote their relatives letters from the camp.KL Ravensbrück was the concentration camp that Germans sat up for female prisoners during III Reich.