1934, Ilya Usyskin, 5k brownish lilac, a single with perforation 14, vertical position of watermark Borders and Rosettes, full OG, NH, VF, expertized by Z. Mikulski, Est. $120-$150 (Image)

1934, 5k, 10k and 20k, complete set of three used on registered philatelic exchange cover from Moscow to USA, tied by Moscow ''21.10.34'' date stamp, exchange tax stamp 5k/70k is on reverse and cancelled by 8-line official cachet, NYC ''11. 1.1934'' transit and Columbus, OH ''Nov.2.1934'' arrival markings, minor wear on reverse and discoloration on front, still F/VF and extremely rare franking by complete set, Est. $600-$750 (Image)