1945, war navy, army postal service R cover to the Command the war navy in Berlin with mute postal stamp from 21.3.45 and fieldpost R-slip of paper with overprint "Fp V" ( = navy field post office Warnemünde) as well with service- and cover stamp army postal service no. M 40777 = command 26. U boat flotilla, good condition, rare, Michel 250, 00