First Day Cover honoring the Mayo brothers, signed by the Swiss Nobel Prize
winner (Physiology or Medicine, 1987)
First Day Cover signed: "Werner Arber", 6½x3½. FDC honoring the Famous
Doctors Mayo Founders Mayo Clininc-Rochester, Minnesota, 5-cent stamp affixed,
postmarked Rochester, Minnesota, September 11, 1964, FIRST DAY OF ISSUE. Swiss
scientist Arber, of the University of Basel, shared the 1987 Nobel Prize for
Physiology or Medicine with Americans Daniel Nathans and Hamilton Smith
"for the discovery of restriction enzymes and their application to problems
of molecular genetics." These discoveries will
aid in preventing or treating malformations, hereditary diseases and cancer.
For more documents by these signers click the names below:
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