Founded in 1936, It aims were defined as the study of the Postage Stamps and Postal History of Russia, including the various independent republics set up between the Revolution and the formation of the USSR.
The ISPP is a non-profit organization dedicated to the study and collection of philatelic materials of Portugal and her overseas colonies. Founded in 1961, it is a affiliate of the American Philatelic Society (APS), with some 300 members worldwide.