American Helvetia Philatelic Society (AHPS) swiss-stamps.org

American Air Mail Society (AAMS) americanairmailsociety.org

Pacific Nothwest Postal History Society (NWPHS) pacificnorthwestpostalhistorysociety.org

Future PIPEX shows and Convening Societies

Society for Czechoslovak Philately (SCP) www.csphilately.net

Rhodesian Study Circle (RSC) rhodesianstudycircle.org.uk

Military Postal History Society (MPHS) militaryphs.org

Auxiliary Markings Club (AMC) postal-markings.org