1941 / 42, war navy, 2 army postal service covers from Replenishment oiler "Uckermark": letter (without on the back flap) with field post standard stamp from 16.5.41 and letter stamp army postal service no. M 01596 ( = Replenishment oiler "Uckermark") and letter with content and field post standard stamp from 9.3.42 as well with letter stamp and senders note army postal service no. M 01596 ( = Replenishment oiler "Uckermark") ; the "Uckermark" is at the 30.11.1942 in Yokohama in Japan through an explosion torn and fallen off, legitimate condition