Postage stamp collecting

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Oliver Faulhaber
Site in German of a stamp dealer of Albert Einstein on scientists stamps and math stamps

Philatelic club "GUGLIELMO MARCONI"
A collector group interested in scientists stamps with Guglielmo Marconi, a pioneer in the fields of radio and telegraphs

Nobel Stamps
A section of the Nobel Prize site with an online gallery of commemorative scientists stamps

Zwetchkenbaum, Sam - Scientists on the Stamps of Israel
A section of a topical site of Israeli stamp issues, specifically with scientists stamps

Dobrescu, Dan - Philatelica
A collector of classic Romanian stamps, computer-themed stamps, the space station Salyut 6, Romanian scientists stamps, Dumitru Dorin Prunariu (the first Romanian cosmonaut), and cancellations made with a Daguin machine

Ernest Rutherford - Scientist Supreme
A collector of memorabilia, including scientists stamps with Ernest Rutherford, the father of nuclear physics

Soppe, Richard - Personal website
Site of a collector of topical stamps with airplanes, dams, explorers, scientists stamps, and the Netherlands

Reinhardt, Joachim - Physicists on Stamps
A large online gallery of stamps with scientists stamps who are involved in the field of physics