1977 13c Energy Conservation

U.S. #1723-24

1977 13¢ Energy
Set of 2

Issue Date: October 20, 1977

City: Washington, DC

Quantity: 79,338,000

Printed By: Bureau of Engraving and Printing

Printing Method: Photogravure

Perforations: 11

Color: Multicolored

Increased prices and decreased supplies of imported oil during the 1970s sparked an emphasis on energy conservation and the development of alternative sources of energy.