Mint. MNH. No flaws. Original undisturbed gum. From a Smoke-Free and Pet-Free Environment.

On October 20, 1977, the U.S. Postal Service issued these Energy Conservation & Energy Development 13¢ gummed stamps in Washington, DC. The artist was Terrance McCaffrey.

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.