You could contact a radio/TV collector club in your area and ask if anyone can help you test the CRT. Here's a list of US clubs:
http://antiqueradio.com/clublist.html
Even if the nearest club isn't next door, they might know someone closer. Collectors live everywhere, not only in big cities
Great score, by the way, regardless of the CRT's condition. More evidence that there are still some great TVs still to be found "in the wild."
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html