Tapping into the collective braintrust

This is a weird question, but it's something that's been bugging me for a week or so. Back in the 1960's (I was a little kid) my uncle would come to visit every summer. And every summer he would have a new car. He drove a lot of MOPAR's, but not exclusively. He did not drive anything that wasn't from Detroit. He drove the first Barracuda I ever saw, which was my favorite. Anyway...
I distinctly remember going for a ride with him one year, and as a kid, I was fascinated by the "barrel style" speedometer his new car had. As best as I can recall, the speedometer was a rotating drum sort of deal with all the numbers painted on it, and there was an opening in the dash where you could read your speed through the "window". I think the numbers were white, and the background paint color changed from green to yellow to red as the speeds increased. Maybe the numbers changed colors.... I can't remember for sure it was almost 60 years ago. I also can't recall if the barrel rotated on a vertical or horizontal axis.
Here's what's driving me nuts... What kind of car was this? I've Googled for hours, and can't find an image of the speedo as I recall it. I do know for sure it was NOT the late 60's Oldsmobile Toronado. I know for sure he did not have one of those cars. Does anyone have any idea what car had a speedo like I described?