American Air Mail Society - http://www.americanairmailsociety.org/ World's largest society for aerophilately and provides many services for the aerophilatelic.
Worldwide Society of Russian Philately - http://home.nestor.minsk.by/ph/ Collection and study of philatelic items associated with the Russian Empire, the Soviet Union and Republics.
Confederate Stamp Alliance - http://www.csalliance.org/ Association for collectors of Confederate issues
and postal history offers a quarterly journal, expertizing services,
and sales circuits.
West Africa Study Circle - http://www.wasc.org.uk/ International society focuses on postal history, particularly of current or former British Commonwealth nations.
The Ottoman and Near East Philatelic Society - http://www.oneps.org/ Promotes the collecting and study of the postage stamps, and postal history of the Ottoman Empire and successor states.
American Plate Number Single Society - http://www.apnss.org Organisation providing news, history, publications
and information for collectors of the plate number single and other
marginal markings. Extensive examples of U.S. plate number singles.
King George VI Collectors Society - http://www.kg6.info/ International group studies the postage and revenue issues produced during the reign of the British monarch from 1936 to 1952.
Scouts Filatelisten Benelux - http://www.scoutsfilatelistenbenelux.be/ Association for collectors of scouting stamps in Holland, Belgium and Luxemborg.
