Smithsonian National Postal Museum
2 Massachusetts Ave., NE
Washington, DC 20013
www.npm.si.edu
The Smithsonian’s National Postal Museum is dedicated to the preservation, study and presentation of postal history and philately. The museum uses exhibits, educational public programs and research to showcase the largest and most comprehensive collection of stamps and philatelic material in the world-including postal stationery, vehicles used to transport the mail, mailboxes, meters, cards and letters and postal materials that predate the use of stamps and make this rich history available to scholars, philatelists, collectors and visitors from around the world. The museum is home to the William H. Gross Stamp Gallery, the largest stamp gallery in the world.

United States Stamp Society
USSS
PO Box 3508
Joliet, IL 60434-3508
The United States Stamp Society (USSS) is a non-profit, volunteer-run association of collectors devoted to the study of postage and revenue stamped paper produced for use in the United States and U.S. administered areas.
Membership information at:
www.usstamps.org/membership
Online store at: www.usstamps.org/store/

Stamp News Publishing
42 Sentry Way
Merrimack, NH 03054
(603) 424-7556

Philatelic Foundation
353 Lexington Ave., Room 804
New York, NY 10016
(212) 221-6555

Collectibles Insurance Services
PO Box 1146
Bala Cynwyd, PA 19004
(888) 837-9537

Sandafayre (Holdings) Ltd.
Egerton Court
Haig Rd.
Knutsford, Cheshire WA16 8DX
Great Britain
+44 1565 653214