WO double hemlock
I bought a spherical micrometer at a trade show years ago….but they never shipped it. Next trade show, I mentioned it to them.A crafty machinist somewhere should make some sort of half spherical jig to test roundness. I assume that's what the ball makers used in the old days.
They couldn’t find any details of the transaction…I had used my visa…but I didn’t feel like the hassle. Another $150 gone.