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Stamps on Stamps

Stamp on Stamp

SOSIG (Stamps on Stamps Italian Group)

The site has a checklist of stamps on stamps (with Michel and Y&T catalog numbers).

Stamps on Stamps

Stamps on Stamps Collectors Club

The Stamps on Stamps Collectors Club is a non-profit philatelic organization. Membership is open to anyone interested in stamps on stamps, stamp anniversaries, and related topics. The club's bulletin is SOS SIGNAL, which is issued quarterly and contains new issue information, articles of interest, and news about the topic. Some informative articles from the bulletin are included on the website.

Overprinted British Stamps on Stamps

A page of GB overprints on stamps on stamps.

Topical Stamp Dealers' Lists: