1944, war navy, registered fieldpost letter to the Command the war navy in Berlin with cancellation adjusted postal stamp from 30.6.44 and fieldpost R-slip of paper with overprint "Fp XXVI" with UB "d" ( = navy field post office Kiel 1 ) as well with service- and cover stamp army postal service no. M 26710 = fleets command, good condition, Michel 150, 00