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A/V jacks really didn't become standard equipment until the mid to late '90's. However, I've seen some nicer high end sets from the early to mid '80's that had them. RCA, Sony, Zenith, Toshiba, etc. all made them. Going back further, there were some commercial grade sets as far back as the tube era that had input jacks. My old school had a 23" RCA tube type color TV in a metal cabinet with all sorts of A/V input jacks; but, I don't think they were like what's on the current sets.
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