Not officially issued: 15 Piaster on 3 Mark violet-black, overprint in Type II "A with serif", vertical pair - upper stamp in original stamp type I and lower stamp in original stamp type II, mint never hinged, flawless condition, unsigned, photo certificate Ronald F. Steuer BPP "in flawless quality.", Michel 55,000.- - without surcharge for the pair, one of the greatest rarities of all issues "German Foreign Post Offices and Colonies"