1944, war navy, army postal service R cover (doubly used envelope) to the Command the war navy in Berlin with mute postal stamp from 27.11.44 and fieldpost R-slip of paper with overprint "army postal service XXIX" ( = navy field post office Flensburg Mürwik) as well with service- and cover stamp army postal service no. M 51575 = command 33. U boat flotilla, the envelope is double opened, otherwise legitimate condition, Michel 200, 00