2 1/2 piastre on 50 penny crown / eagle brownish carmine (UV brown carmine), cancelled \"Constantinopel 1 4.2.90\", above short perforation as well at the bottom two inconspicuous shorter perf tips; small thin spot at the upper margin, photo expertize Manfred Wiegand BPP: \"it is a very rare stamp. \", Michel 4.000.-