Maybe this isn't the place for a history lesson. But, how much over lap is there on the XL12 models. I seem to remember the picture of the guy holding a Blue XL12 in palm. I was told the XL stood for Extra Lite and the 12 for 12 lbs. That was about 1968 or so. We started buying ours in the early 70's, and it seems to me they were all Super XL 12's and were red. I can't remember if they were auto's or not, but if it were available then, Dad would have gotten it. He was so into keeping his chains and bars oiled that if he had to tell someone to keep their thumb pumping more than 3 or 4 times, he'd let them go. He'd hand them a $20 dollar bill and tell them to catch a cab home. It was cheaper than burning up one of his saws. Anyway, there are a bunch of variations of that saw, and it was made for a long time, were there times when several variations were available at the same time? I've also seen blue ones with one or two red parts on them and the original owner said they came that way? Just curious, Joe.