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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)