Sparrow's "spacecraft" was a logging balloon built by Goodyear and operated by Bohemia Lumber in the 60s.
The license plates on the two Chrysler Imperial vehicles are in sequence and are not regular automobile plates. Possibly Manufacturer plates. Sparrow's girlfriend's blue Imperial convertible X 62 992. Sparrow's black Imperial X 62 993.
The year 1966 and radio telescopes and 4 million miles. 4 million miles is about 22.5 light seconds. In the 1930s a strong radio source was observed at the dense core of our galaxy, about 126,000 light years away. By the 1960s we were studying radio sources 10s of millions of light years away.
Debut of the U.N.C.L.E. car