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atom symbol & E=mc2

  • Colnect-5019-111-Emc2.jpg
Short desc: atom symbol & E=mc2


Things in this design:
symbol atom symbol
symbol E=mc2

This design is used by one stamp:
Togo airmail 7/2/1979 100f issue=Albert Einstein 100th perf=13.5x14






Record of changes


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