After a year or so of constantly checking stamp dealers, I finally found a mint never hinged 1942 Panama 1c violet postal tax stamp to finish my 1938 40th Anniversary of the Discovery of Radium collection! The stamp features Marie and Pierre Curie, and I got it from a dealer in Poland.
Click here to see the completed collection: https://dicksstamps.online/collections/1938-radium-curie/
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Posted 6 June 2023 by Dick Eassom