Lot: 10 Pfennig, bright red, Airmail (VI) 1924, with printing errors I and II, each in used condition. "DANZIG-LANGFUHR" or "DANZIG FLUGPOST", unsigned, and each individual stamp with an expert's opinion from Ruediger Soecknick BPP (2004 / 2007), "genuine and flawless", Michel price 500.-