Measuring a cam lobe????

I gotta say....... that’s the most screwed up dial face I’ve ever seen.

It took me a few minutes before I caught on........ the outer range isn’t like most dial calipers.
It’s not .001”....... it’s .010”.
One revolution per inch.

So, the first pair of numbers is 1.265 from 1.580 ...... .315 lobe lift = .4725 lift.

If both intake and exhaust lobes are the same, it’s probably a .474 cam.