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The first set I saw with VIR was a mid to late '70's GE console. I think it used the "YM" chassis. I also saw a Curtis-Mathes with the feature. On both sets, the picture looked better with VIR turned off. It was sometime in the mid '90's when I had these sets. Most of the "auto color" systems I saw were a switch that would disable the front panel adjustments and enable preset controls that were hidden inside the set. In some sets, the user controls would have limited effect with the auto color switch on. Our old '77 RCA ColorTrak 19" had a photocell that would adjust the picture according to room light. I think RCA continued to use the photocell in their better sets up until the early '90's. I've ran into plenty of Thomson era RCA's that have an auto color setting in the user menu. I really couldn't tell any difference in the picture no matter if it was on or off. Like has already been said, most TV broadcast signals are much more stable with less error than they used to be.
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