Chuck, I don't even know if my calipers are still accurate. As far as I know they haven't been against a gauge block in YEARS. I do know my cousin Lloyd who used to work on these things, said they were in beautiful condition.Yeah thats the BIITCH of the digitals..as you ever so slightly roll the cams the numbers click by so fast its hard to get a perfect sweet spot to get readings. Thats why in the PM I said i was gonna look for a set of dual read mechanicals..I tend to have much more faith in them than the digitals. Now you know 100% for sure the crank and upper half is of good quality..piece of mind is priceless.
I do know when I hold them up to light while looking through my eye loupe, the jaws look perfectly parallel with just a slight amount of wear out at the very edge of tips. I'm guessing somewhere around .0001"
Not bad for somewhere around $33 shipped