Claude
The cachet artwork depicts the cliff dwellings of Mesa Verde, Colorado, rendered in yellow, green, and brown tones, with layered rock formations above the adobe structures. Accompanying text explains how the cave dwellings represent early energy conservation through passive solar design. The stamp is the 1977 13-cent Energy Conservation issue (USA 13c) featuring a stylized sun and light bulb graphic in red, yellow, and orange. The postmark is a circular date stamp from Washington, DC dated October 20, 1977.
(The automatic summaries sometimes misidentify the postmark as part of the cachet artwork.)
