1930, DOX airmail card with a lot of text and horizontaly pair 2 1/2 G. Airmail and 50 Pfg. city crest from Gdansk 5 airmail 4. 11. 30 via Friedrichshafen and Rio de Janeiro (22. VI. 31) to Lancaster with arrival postmark, superb, certificate with photograph Kniep BPP, rare!