Popov Trident Type. 1918, black overprints on perforated 7k, 10k, 15k and 5r x2, Sword Breaking Chain 70k, imperforate 1k (black, pair), 1k (violet - inverted, pair), 2k, 3k and 5k (tete-beche pairs) plus 5k normal single, the total is 17 values, 5 mint and 12 used, F/VF, not signed, but came from the Dr. Seichter Collection, Est. $400-$600 (Image)