Ahh you read my mind before I could post! I was going to suggest looking at the coils first as you would have to remove them anyway. You could then make a decision. As it happens, you seem to have the later coils so there will be a picture on this tonight then?
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Not sure about the regun possibility. I think it depends on where the neck is broken and it seems as if the whole neck is broken off. There are also small cracks in the bulb where the neck was. That used to be the case anyway when I took tubes back to the local regunners and they would always have to recoat the screen if the neck had been broken even if the phosphor appeared to be intact.
Might be worth contacting RACS to see what they say.
Rich.