" BERLIN POTSDAM BAHNH ": - Ra3, KBHW 79, on a post-free official cover to the royal one government U. Prussian state secretary of Bodelschwingh ( Preuss. Secretary of 1852 until day of death 11.5.1854 ) to Arnsberg, back the railway postmarks Berlin-Minden, Deutz-Minden and Hamm-Paderborn