1942, war navy, registered fieldpost letter to the 2. U. Education department in Neustadt with mute postal stamp from 11.12.42 and fieldpost R-slip of paper with overprint "Fp XXVII" ( = navy field post office Gdansk 6) as well with service- and cover stamp army postal service no. M 42927 = command 8. U boat flotilla, good condition, Michel 250, 00