18 penny blue-green (Kriwoj Censured) in mixed franking with 4 penny and 8 penny Hitler - both each overprint "Ukraine" as properly franked use on official postal letter, cancelled "the zone commissioner Kriwoj Censured - 1 -" and "Nikolajew German offical postal service Ukraine -c 26.2.44 -12" to Passau, excellent condition with slight traces of use at the envelope, the stamps very fine, photo expertize Gerhard Krischke BPP "the letter is properly franked franked in fact with the provisional stamp for the distance base - service post office and 12 Pfg. For the forwarding as simple letter. Covers of this kind are very rare, there only a few have been preserved are. "