Following the failure of the Delta rocket carrying Echo 1 on May 13, 1960, Echo 1A (commonly referred to as just Echo 1) was successfully put into a 944 to 1,048 mi orbit on August 12, 1960, by NASA.
This was the first 'Space Stamp' with an actual subject of a real space vessel, unlike the generic or symbolic rocket depicted in the Fort Bliss issue of 1948.