1939 / 40, war navy, 3 army postal service official letters with service- and letter stamp army postal service no. M 20583 ( = liner "Silesia") as well 2 army postal service covers with letter stamp and senders note army postal service no. 20583 ( = liner "Silesia") and an army postal service card to a midshipman to S. On the "Silesia", good legitimate condition