Hamburg - PHILADELPHIA, DSP single circle postmark with number "III", steamer Prince adalbert 6.10.12, the sister ship of the steamer Prince Oskar, extreme rare cancel on 10 Pfg postal stationery card with very clear DSP single circle postmark from board of the ship to Berlin to the famous collector Dahmann, only a few documents from this route general and from this ship registered, superb (former starting price 800)