Originally Posted by
Top_Gunn
I'm guessing the B-17. It was manufactured by three companies, and it was manufactured throughout WWII, though not by all three all of that time. Clue No. 1 seems a bit ambiguous. My guess is based mostly on its having been flown by Gene Roddenberry, who gave us Star Trek, probably the best TV show of the 60s (except for F Troop, of course).
Well, drat! You may have it, Top_Gunn. I mentally eliminated the B-17 early on for some reason; and never reconsidered it. It does seem to qualify. Thanks; Ernie P.