Useful Links


American Stamp Dealers Association
www.americanstampdealer.com
  American Philatelic Society
www.stamps.org
 
U.S. Philatelic Classics Society
www.uspcs.org
  The Collectors Club of N.Y.
www.collectorsclub.org
 
The Royal Philatelic Society London
www.rpsl.org.uk
  Philatelic Traders Society
www.thepts.net
 
Philatelic Foundation
www.philatelicfoundation.org
  Professional Stamp Experts
www.gradingmatters.com
 
P.S.A.G.
www.stampauthentication.com
  Professional Coin Grading Service
www.pcgs.org



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