1, 50 Karbowanez with overprint "GK-Ssarny" in type I, vertical pair, properly franking on registered letter from "RAFALOWKA 27 respectively 28.11.41" to Sarny with arrival postmark "Sarni -a 2 12 41", cover slight transport traces, stamps gum spots - through affix the ungummed issued stamps, photo expertize Gerhard Krischke BPP "the letter is properly franked franked also used. Such commercially used letters of this kind are very rare. "