2 1/2 piastre on 50 penny bright olive green, having bright colours and perfect perforations as well relatively well centered extremely fine copy, tied by single circle postmark \"CONSTANTINOPEL 1 19.3.87 2-3 N. \", faultless condition, in this quality an extremely rare stamp, expertized Bothe BPP, Hollmann BPP and photo expertize Manfred Wiegand BPP \"perfect quality! Used examples this colour are rare. \", Michel 4.000.-