Vibrant original signed color ink sketch of a shuttle launch with the message, ‘Benefiting Mankind,’ postmarked May 21, 1981, with six different stamps designed by McCall, on a white 9.25 x 4 First Day Cover, featuring a cachet honoring his artistic achievements, signed at the bottom in black ballpoint, “Robert McCall.” Matted and framed to an overall size of 20.5 x 15.5. In fine condition. Pre-certified Steve Zarelli and RR Auction COA.
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