All CTC110 should be in line jugs.
The cabinet was also used on RCA's last modular chassis,
dont remember the CTC# but saw darn few of em. So
either rare or VERY reliable set.
Model starts with 3 letters such as FGR465W etc.
On RCA CRT bias is same as what others call screen controls.
The drives are to take any color out of the bright areas after setting
the bias. The by the book procedure is to long to type out but
what you can do is :
Mark the 5 controls at 12:00 so you can go back to where you started.
Mess around with them to see the effect & try to improve things
When done one of the bias controls should be CCW.
73 Zeno