ROBERT MCCALL ORIGINAL STAMP DESIGN.
Original pencil, felt-tip and wash on paper, main image 4 x 13½ inches, on 12 x 15½ inch sheet, signed and inscribed below. Framed with two first day covers postmarked Houston and Huntsville, August 2, 1971, featuring the completed stamp; both signed by McCall, one embellished with an ink sketch of a descending lunar module.
An original Robert McCall design for the 8¢ "United States in Space - A Decade of Achievement" postage stamp. McCall proposes a twin stamp, the left showing Mercury and Gemini capsules in Earth orbit (the Gemini spacecraft with Ed White during his EVA), while the right side shows the lunar suface with a Rover, Lunar Module, and CSM in orbit above.
The drawing is inscribed at length below: "Dear Steve, Since the Apollo 15 will be carrying a Lunar Rover Vehicle for the first time I felt it would be an important symbol to include. Of course I would like very much to do a twin so my first choice of the sketches is No 1, or No 2, however I like for a single No 5 + No 10. Indeed I feel that any of these sketches could result in a handsome stamp. Sincerely, Bob. [Postscript:] Steve: I have the latest info from NASA on the Rover etc."
McCall's completed stamp was similar on the right half, but on the left side he abandoned the Mercury/Gemini element which might have proven too detailed.