I would agree this was the last of RCA's best tube chassis. CTC17-21-25-28-30-35
I had the guts of a CTC21 (non-remote but power-tuner from a customer's combo that was fitted with a new set) I fitted that beautiful
escutcheon into a vacated RCA cabinet along with a good 25AP22 hi-lite CRT.
IT looked so awesome, we used it for a summer of cable-binge-watching when in tech school, I sold it when we got another Zenith after selling the last one for rent. That tells you how good it was.