Description
Signed card, 5,25 x 3 inch, signed and inscribed in black ink "Very sincerely yours - W.D. Coolidge - Schenectady, N. Y. - Dec. 27, 1926", attractively mounted (removable) for fine display with a photograph, shows William David Coolidge at a X-ray machine (altogether 8,25 x 11,75 inch), with mild signs of wear - in fine to very fine condition.
Further Information on the person
Profession:
(1873 - 1975) American physicist, who made major contributions to X-ray machines
Year of Birth: 1873
Certificate of authenticity
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