15 piastre on 3 Mark German Reich with inscription "Reichspost", overprint in type I, vertical type pair with the original stamp types I (lower stamp) and II (upper stamp) from right margin of sheet with marker cross on margin to facilitate cutting or perforating of panes, perfectly mint never hinged, unsigned outstanding quality, photo expertize R. F. Steuer BPP (2023) "perfectly submission. ", Michel 700.- plus