I learned of the DC-4E when I found an ashtray incorrectly identified as portraying a Constellation that is actually of a DC-4E. I wonder how an aircraft that existed only as a single prototype rated a nice piece of memorabilia . Look up "Vastushin AirTray DC-4E"
Three of the four airlines involved in the DC-4E's development - Pan Am, TWA and Eastern - would buy "Connies" (TWA was also involved in its development). United opted for the DC-4, which all four would buy after the war, and later the larger DC-6 and DC-7.
