10 Pfg airmail with plate flaw "comma top left at the left tower" with additional franking national coat of arms 3 Pfg (10) and 5 Pfg (2) with pictoral hand cancel "Gdansk / XIX. UNIV. KONGRESO DE Esperanto - 4. 8. 27. 14-15" on correctly franked registered airmail cover to Berlin with arrival postmark, in perfect condition, certificate with photograph Earth Vienna BPP (1998), Michel 1000,-