15¢ Microphone and Speaker
Electronics Progress Issue
Issue Date: July 10, 1973
City: New York, NY
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
Color: Gray green and multicolored
Celebrates the progress made with component parts in the electronics field. Emile Berliner invented the microphone; Thomas Edison, the vacuum tube; and Vladimir Zworykin, the photoelectric cell, which brought television to life in 1928.