Officially unissued: 15 Piaster on 3 Mark violet-black, overprint Type II "A with serif at top", vertical type pair, upper stamp basic stamp Type I, lower stamp basic stamp Type II, mint never hinged, perfect condition, unsigned, photo certificate Ronald F. Steuer BPP "in sound quality.", Mi. 55.000.- without premium for type pair, one of the greatest rarities among all "German Foreign Post Offices and Colonies" issues