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.
Mistral
The cachet artwork features a detailed illustration of the Mesa Verde cliff dwellings in Colorado, depicted in warm earth tones of yellow, brown, and green. The stamp in the upper right corner showcases a stylized design of a sun and light bulb, symbolizing energy conservation. The postmark is a circular, black cancellation with the text 'WASHINGTON, DC OCT 20 1977 20013.' The printed text on the cachet explains the energy conservation principles of the cliff dwellings. The cover is in excellent condition with clear and legible details.
(The automatic summaries sometimes misidentify the postmark as part of the cachet artwork.)
