United States | Antarctic Treaty Plate Block of Four 8-Cent US Postage Stamps Issued 1971 Red and dark blue

Description

This collectible plate block of four 8-cent postage stamps was issued by the US Post Office to commemorate the ten-year anniversary of the signing of the Antarctic Treaty.
Issue Date: June 23, 1971
First City: Washington, DC
Printed By: Bureau of Engraving and Printing
Printing Method: Giori Press
Perforations: 11
Color: Red and dark blue
Mint, never hinged condition.
We often have multiple copies of this item in stock; the plate number and/or position may vary.