United States | 1973 Microphone and Speaker Plate Block of Four 15-Cent United States Postage Stamps Gray green and multicolored

Description

This collectible plate block of four 15-cent postage stamps was issued by the US Post Office to honor progress made with component parts in the electronics field.
Issue Date: July 10, 1973
First City: New York, NY
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
Perforations: 11
Colors: Gray green and multicolored
Mint, never hinged condition.
We often have multiple copies of this item in stock; the plate number and/or position may vary.