1937, post the legion Condor, letter of a voluntary soldiers with full content, sender with coded unit". 6. F. / 88" (6. flak 88. Div. / legion Condor), in the text dated 21.3.37, Entrance in Berlin with reverse date straight-line cancel "24. March 1937", censorship signature on sheet of writing paper dated "25. / 3. ", postal transported with 12 Pfg Hindenburg, glued close to the margin, from BERLIN 27.3.37 to Waldheim, rare complete ensemble.