Gdansk army postal service 1939, two official letters with blind-embossed inscription war navy from Fp-no. 07808 ( = 1. Räumbootsflott. ), Gdansk Neufahrwasser 21. 9. 39 respectively 29781 ( = 7. Minens. Nifty. ) from Gdansk 5 27. 9. 39, well, still before Polish surrender