1973 8c Progress in Electronics: Transistors and Printed Circuit

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304596 -- Mint Stamp(s) -- Mint Stamp(s)

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U.S. #1501

8¢ Transistors and Printed Circuit Board
Electronics Progress Issue

Issue Date: July 10, 1973

City:New York, NY

Quantity: 159,775,000

Printed By: Bureau of Engraving and Printing

Printing Method: Lithographed, engraved

Perforations: 11

Color: Tan and multicolored

Another salute to electronic progress, this issue commemorates the invention of the transistor by Bell Telephone Laboratories in 1948. The transistor made miniaturization possible and opened the door for production of pocket radios and computer parts.