Which years had 100 or 120 mph speedometers?

I finally got my 1973 Duster assembled to point of being driveable, around the storage lot at least. When reviewing video of the driving, I noticed the car has a 100 mph speedometer. It also has the RED tenths digit, which I've read in the past means a replacement odometer.

I had also bought another instrument cluster to rebuild and install, as the one in the car now has extra holes cut into it. The replacement cluster has a 120 mph speedometer.

Which years used 120 and 100 as the standard speedometer?