A Washington, D.C., first-day cover for the 13-cent Energy Conservation stamp (Scott 1723), issued October 20, 1977. Terrance McCaffrey designed the stamp's house, gasoline container, and light-bulb imagery; a companion Energy Development stamp used the same design with a different title. Gerry Adlman's GAMM cachet presents Mesa Verde cliff dwellings as a passive-solar lesson, claiming low winter sun warmed the walls while the overhang blocked direct summer sun. That explanation fits some south-facing alcoves, but site orientations varied, so it should be read as the cachet's interpretation rather than a universal description of Mesa Verde architecture.
Claude
The GAMM Cachets cachet features a colorful woodcut-style illustration of the Mesa Verde cliff dwellings in Colorado, with terraced yellow-brown hillsides, green trees, and ancient stone structures. Below the artwork, explanatory text describes how the cave dwellings served as an early example of energy conservation through passive solar design. The 13-cent 'Energy Conservation' stamp depicts a stylized sun with a face, a yellow light bulb, and a red appliance/generator on an orange background. The postmark is a circular hand cancellation from Washington, DC dated October 20, 1977.
Mistral
This First Day Cover features a vivid yellow and brown woodcut-style illustration of Mesa Verde's ancient cliff dwellings on the cachet, emphasizing passive solar energy conservation. The 13-cent stamp depicts a stylized sun, light bulb, and generator in bright colors, symbolizing energy conservation. The postmark is a circular hand-cancellation from Washington, DC, dated October 20, 1977. The printed text describes the energy-efficient design of the Mesa Verde dwellings. The cover is in excellent condition with clear, legible details.
(The automatic summaries sometimes misidentify the postmark as part of the cachet artwork.)
