The big 'X' on the CRT was drawn with a black Crayola, I think. It's the same tool they use to write their prices on stuff. Comes off easily with a dry rag, but persists if you use a wet one.
Ditto the sentiments about C4C. One of the single most wasteful government 'programs' I've witnessed in my time on Earth. I was lucky to have not witnessed too many vehicles destroyed.
This set has a Japanese picture tube, but I don't believe it's an AOC. The back panel states it was made by Rockwell International. The other thing I noticed is the power cord appeared to have been cut long before the thrift stote got it. They may have never powered it on for test, and tossed it aside as soon as they saw knobs. Must be a dirty word in thrift stores these days. :P The only other sort of issue is the picture is moved considerably to the right, with the right-most edge cut off a bit. I wasn't able to locate a horizontal control, other than a horizontal lock, which did move the picture but caused it to go haywire if I tried to move the image to the center.