KK Covers

Scott 1774 Albert Einstein FDC, postmarked Mar 4, 1979 (Princeton, NJ), Collins H/P cachet.
Albert Einstein(14 March 1879–18 April 1955) was a theoretical physicist, philosopher and author who is widely regarded as one of the most influential scientists and intellectuals of all time.
Einstein is best known for his theories of special relativity and general relativity. He received the 1921 Nobel Prize in Physics “for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect.”