1940, war navy, army postal service official letter with machinery stamp KIEL 1 from 6.4.40 with advertising insert "the German language red cross helper in war and peace. Assist with! " as well with letter stamp and senders stamp army postal service no. M 29369 = heavily Kreuzer "Blücher", the on the same day as command ship the warship group 5 to the "company Weser exercise" to the occupation Norway from Kiel auslief and at the 9.4.1940 after several artillery and torpedo hits in the oslo fiord subsided; good legitimate condition