Rebuilding Metal Cone CRT's

[Duke Nukem]

Kinda prompted by another thread, and not being that familiar with early colour CRT's, I get the impression that CRT's with large areas of glass-metal seals whose seals have leaked tend to be suspect candidates when it comes to rebuilding ?

I ask because the UK had a brief flirtation with B&W metal cone CRT's and replacements were pretty much unobtainable even by the end of the 50's; so far I only know of one person that has a working metal cone CRT. So, what do you think the probability of rebuilding metal cone tube rebuilt *and* the result last more than 6 months ? I must admit I'm amazed they ever worked at all.

I know the previously mentioned colour tube isn't metal cone, but it does have a large glass-metal seal doesn't it ?.

TTFN,
Jon