Trident Overprints -Kharkiv. 1918, black overprint (type 1) on perforated 1k- 70k and imperforated 1k-35k, complete set of 22 postally used values, several cancelled on individual pieces, F/VF, most important stamps signed by J. Bulat, ex-Dr. Zelonka, C.v. is about $400 (Image)

Trident Overprints -Kharkiv. 1918, black overprint (type 1) on 7k light blue, three side margin horizontal strip of five, side stamps with double overprints and extra sideways overprint on margin, full OG, NH or LH(1), VF, ex-Dr. Zelonka, C.v. $205++ (Image)

Trident Overprints -Kharkiv. 1918, black overprint (type 2) on 7r black and yellow on vertically laid paper and on perforated 1r-10r, including inverted overprints on 3.50r and 7r, full OG, mainly LH, some signed by Dr. Seichter, ex-Dr. Zelonka, C.v. $504, Est. #50-$400 (Image)