This 1964 5¢ U.S. stamp honors the Doctors Mayo on a First Day Cover postmarked Rochester, Minnesota on September 11, 1964. The Art Craft cachet features portraits of Dr. Charles H. Mayo (1865-1939) and Dr. William J. Mayo (1861-1939) alongside the Mayo Centennial emblem.
The Mayo brothers transformed American medicine by establishing the Mayo Clinic in Rochester, pioneering the concept of integrated, multi-specialty group practice that became a model worldwide. Their work in the early 20th century elevated standards of surgical care, medical education, and patient-centered research.
A notable detail is the cachet’s inclusion of the Mayo Foundation centennial seal and the Latin motto “Praestantia et humanitas,” emphasizing both excellence and compassion in medicine.
The cover is addressed to Robert E. Bakeman, D.O. in Grand Rapids, Michigan, reflecting the era’s growing network of osteopathic physicians who collected medical-themed philately.
A clean, well-centered example ideal for medical history or Mayo Clinic topical collections.
