Bidspirit auction | German Occupation During the WWII

German Occupation During the WWII - Ukraine - Sarny - 1941, inverted dark red overprint ''GK.-Ssarny'' on 50k black, basic stamp of type II (premium 50%), bottom sheet margin single, printed on reverse side of dark violet paper (not glazed), no gum as issued, NH, VF and extremely rare, only 7 stamps of type II possible with double error, Z. Mikulski certificate, Mi #4A G K, var, C.v. €5,250, Est. $1,000-$1,200