SV1XV

SV1XV club

Posted: 09 Dec 2017


Taken: 01 Jan 1973

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USA 1973 $0.11

USA 1973 $0.11
Block of four USA stamps honoring the invention of Audion tube by Lee DeForest. Progress in Electronics set, 1973.

Nouchetdu38, Erhard Bernstein, have particularly liked this photo


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