Which color set came first?

[Mal Fuller]

My first boss, Amelio (Mel) Fragassi of Deerfield, Illinois had worked for Admiral during the early days of Admiral's color TV development and production. RCA was very anxious to involve other manufacturers in color TV production. According to what Mel told me, RCA actually lent engineers to Admiral to help Admiral launch its production of color TVs. RCA also sold major components such as CRTs, yokes and convergence yokes. It's my conjecture that Admiral was not the only TV manufacturer so assisted by RCA. The Admiral color sets I am personally familiar with employed the 21AXP22 CRT. I suspect that RCA recruited competing manufacturers during the earlier era of the 15GP22.
The 21" Admirals were unique in that the 21AXP22 CRTs were chassis mounted.