1963 Philco

[old_tv_nut]

I don't have a CTC-15 to compare it to either, but I see three sound trap adjustments:
A1, tune for minimum response at 41.24 Mhz, along with R19. A11, tune for minimum response at 4.5 MHz (intercarrier, demodulated result of 41.25 MHz).

Still couldn't tell you if the chroma ringing you see is the result of misadjustment or an unimprovable design flaw. The best thing would be a complete IF alignment first including the three sound trap adjustments, then see if it's any better.