A working 21" color prototype in 1951?
I'm like Kojak.
I don't buy it.
I have never seen any proof.
The following is from the late Ed Reitan's website.
"July 9, 1951. A 21-inch direct-view color picture tube was shown by RCA. (RCA used the term "shown" when equipment was not operational!)"
http://www.earlytelevision.org/Reita...bc_firsts.html