5 Pfg Germania with overprint "Gdansk" as well "10" on 20 Pfg Germania on 15 Pfg postal stationery postcard as 3 colours coloured mixed franking with cancellation through bridge date postmark "Gdansk Schidlitz 14 / 9 / 20" (gray wolf 3.0) to Oranienburg addressed, faultless condition, expertized pupils