US 1964
DOCTORS MAYO
Dr. William J Mayo & brother Dr. Charles H Mayo sculpted busts by James Earle Fraser.
Surgeons who founded the Mayo Foundation for Medical Education and Research, in affiliation with the University of Minnesota at Rochester.
Water Activated Gum
Scott 1251
Perforated 10.5 x 11
Lower Left Stamp Mr. Zip Block of 4
Mint Never Hinged
