Description
Müller, H., The ornamental pattern franking stamps of the German Reichspost 1920 to 1922, article in Poststempelgilde eV, Gildebrief 227, 2008, also including Hagel, HR, The surcharge for postal warehouse shipments 1920-1923 and Gottstein, New findings on foreign exchange post offices of the German Federal Post Office 1947-1955 #69815