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  Postage stamps

  First Day Cover commemorating airmail and Israeli exports

  • 1968

  Stamp depicts Boeing 707, chemical apparatus, and heavy oxygen isotopes.

  • Subject Postage stamps, Isotopes, Aeronautics, Commercial, Oxygen--Isotopes, Postmarks, Commemorative postage stamps, Israel, Science on postage stamps, Exports, First day covers (Philately), Cachets (Philately)
• 
  Postage stamps

  First Day Cover commemorating Albert Einstein

  • 1956

  Stamp depicts Albert Einstein and the the equation of mass-energy equivalence (E=MC2). Einstein has been featured on numerous stamps from around the world. His first appearance on a stamp is believed to be on this…

  • Artist Hamori, George
  • Subject Postage stamps, Special relativity (Physics), Postmarks, Commemorative postage stamps, Israel, Science on postage stamps, Einstein, Albert, 1879-1955, Nobel Prize winners, Cachets (Philately), Physicists, First day covers (Philately)