50 Kopecks Perekop with hand stamp overprint "Eesti post", from right margin of sheet, mint never hinged, very fine, these stamp is one of the issues, which the overprint first at the submission through post customer at the counter received, so far only 6 examples near the BPP expert Thomas Loebbering registered, expertized Keiler BPP, photo expertize Gerhard Krischke BPP "the condition is perfect. ", Michel with 1.200 extortionate undervalued rarity.