Invention of the Transistor, Bell Laboratories, Brattain, Shockley, Bardeen, First Issue USA

United States Commemorative Postage Stamp, Progress in Electronics, Invention of the Transistor, Circuit Board,

Issued July 10, 1973, in New York, New York,

First Day of Issue Cover, FDC, Art Craft Engraving Cachet, Walter Brattain, William Shockley, John Bardeen, Nobel Prize Winners for Invention of the Transistor at Bell Laboratories, Unaddressed,

Cover in Removable Transparent Poly Sleeve and Mailed With Protection,

Made in the USA.

Genuine First Day of Stamp Issued Cover Cancelled on the First Day of Issue Date by the U.S. Postal Service,