Is my TV high defenition?

[Wilko21]

I have a 68cm Celestial SF2790 CRT TV that has YCrCb ports on the back. I'm assuming this means it is at least capable of 480p ED resolution but what are the chances it's capable of anything about that such as 720p HD resolution and how would i find out?

I've searched on the net and couldn't find anything.

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[DBloke]

any logos on it
most newr tvs have some someware on the front