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Stamps on Stamps
Collectors' & Reference Sites
- 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.
- SOSIG (Stamps on Stamps Italian Group)
- The site has a checklist of stamps on stamps (with Michel and Y&T catalog numbers).
Stamp Dealers' Sites
- Stamp Centenaries - list from Avion Thematics (UK)
- Stamp Centenaries - list from JustWendy Thematics (UK)
- Stamp Collecting - list from Stampstudio (USA)
- Stamp on Stamp - list from Avion Thematics (UK)
- Stamp on Stamp - list from JustWendy Thematics (UK)
- Stamp on Stamp - list from Stampstudio (USA)