[old_tv_nut]

ATTENTION: I wrote the above corrections post late at night and may have remembered the exact dates of the introduction of different phosphors wrong. Introduction of vanadate rare earth may have been as early as 1958 as claimed, but I'm not sure.
Sylvania advertised their rare earth "Color Bright 85" round tube in 1965, and the all-sulfide tubes (previous to rare earth) were in use in the early 60s, so the 1958 date for vanadate needs verification.