Right off the bat, the width tells you if it's for an ATC or not.
The width should be the same width as a typical 200X 350X 250R front axle collar, because the speedometer gear housing takes that collars place. The tapered down collar, not the hat on the caliper side.
A bucket full of them I would think would be nearly all street bike speedometers; Similar but geared for a street bike front tire.....
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country