1943, war navy, registered fieldpost letter to the marine artillery ordnance in Wilhelmshaven with mute postal stamp from 2.8.43 and fieldpost R-slip of paper with overprint "Fp XIII" ( = navy field post office Gotenhafen 1) as well with service- and cover stamp army postal service no. M 16334 = torpedo boat "leopard", legitimate condition, Michel 250, 00