Poltava. 1918, inverted violet overprint (type 1) on perforated 2k-70k and imperforated 2k and 3k, nice and fresh, full/part of OG or unused on gum (5k), VF, stamps of 3k perf and 2k imperf are not listed in the Cat., ex-Dr. Zelonka and Dr. Seichter, Est. $150-$200 (Image)