1944, war navy, registered fieldpost letter to the navy Command north in Wilhelmshaven with mute postal stamp from 18.4.44 and fieldpost R-slip of paper with cancellation overprint "Fp XIII" ( = navy field post office Gotenhafen 1) as well with service- and cover stamp army postal service no. M 10825 = command 21. Landing Lehr flotilla, two-sided opened, otherwise but good condition, Michel 250, 00