Bidspirit auction | German Occupation During the WWII

German Occupation During the WWII - Ukraine - Sarny - 1941, dark red overprint ''GK.-Ssarny'' on 50k black, basic stamp of type II (premium 50%), printed on reverse side of dark violet paper (not glazed), neat corner cancel on a piece, VF and scarce, G. Krischke certificate for a cover from which this stamp was originated, Mi #4A G, C.v. €3,750, Est. $600-$750