| stamps.net | Stamps.Net - Philately's Online Magazine |
| stampcafe.com | Stamp Cafe - The Latest Philatelic News & Information. |
| upu.int | Universal Postal Union, Upu: Worldwide Postal Organization |
| philatelic-traders-society.co.uk | The Philatelic Traders Society |
| nvph.nl | De Nederlandsche Vereeniging van Postzegelhandelaren |
| linns.com | Linns.Com: The Website Of The World's Largest Weekly Stamp Newspaper-linn |
| f-i-p.ch | Fédération Internationale de Philatélie (FIP) |
| asdaonline.com | American Stamp Dealers Association |
| aphv.de | Bundesverbandes des Deutschen Briefmarkenhandels - APHV e.V. |
Germany , Bayern , Nrnberg