You can read about the restoration here:
www.earlytelevision.org/rca_cpa_restoration.html
The waviness is due to ringing in the horizontal circuit because we are using a CT-100 yoke rather than the original. After I took that photo I was able to get the original yoke to work, and the ringing is gone.
This picture is NTSC. The colors are wrong, and we have a way to go to get it right. After the chassis was used for CPA it was modified to run on NTSC.
The next step is to build a CPA signal source and change the chassis back to CPA (not difficult). Then we will be able to watch CPA color.