30 Kopecks special stamp "agriculture exhibition - pavilion Karelo-Finnish SSR" with black typography overprint "Laisvi Telsiai 1941. VI. 26" in type IIIb the 2nd issue, overprint flaw XVIII "i in lieu of 1 in 1941", mint never hinged, very fine, issued only 40 examples, unsigned, photo copy of a certificate Gerhard Krischke BPP for former block of nine "the condition is perfect. " Michel 1.350.-