Poltava. 1918, violet overprint (type 1) on perforated 1k- 70k and imperforated 1k-35k, the total is 20 values, including all the ''key'' values, full OG (35k is unused, no gum), NH (4) or LH/hinged, F/VF, some with experts' sign, ex-Dr. Zelonka, C.v. $780 (Image)

Poltava. 1918, black overprint (type 2) over black surcharge 10k on 7k light blue, nice and fresh, full OG, LH, VF, expertized by Dr. Seichter and others, no price indicated for a mint example, C.v. $250 for used stamp, Est. $300-$450 (Image)