5 piastre on 1 Mark, dark carmine red, German post offices in the Turkish Empire, with overprint flaw I: " "P" from "piastre" above flattened", used "CONSTANTINOPEL 24.7.08 5-6 N German post", good condition, small thin spot, short perforation above, unsigned, photo expertize Manfred Wiegand BPP (2025), Michel 1000.-