Postage stamp collecting

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Frei, Werner - Antarktis Online
Site in German of a Swiss stamp collectors site with information about the postal system and philately of Antarctica

Manta, Victor - Art on stamps
A Swiss stamp collectors site fully dedicated to the passionate topic of Art on stamps

Manta, Victor - Communism on Postal Stamps
A Swiss stamp collectors site dedicated to communism, its leaders and involved countries on stamps

Fuerst, Walter - Walter Fuerst Philately
A Swiss stamp collector with an independent stamp auction house, also has items for sale on eBay