The only way to be sure is to put the cams into an engine and do a valve lift graph. The Mk IIs have a rounder nose than the MK Is or IIIs but then there are 105 cams and all sorts of peoples experiments about. You can't even just measure the diameter of the base circle and the overall height of the cam to get the displacement as the lever followers give a geared up effect. Roy Robertson went to the trouble of making a mock up of the timing gear and valve lifting system so that he could measure the valve lift on his test bed and not on an engine. It was a lot of precision work.
I was only teasing, as I was guessing this is a Post-War enquiry in the Pre-War category?
Equally of course, people have re-built Pre-War lobes.
And, as Norm' says really accurate measurement is tricky. I guess for most of us the practical way is with a dial gauge on top of the valve stem. But, then deciding what your measurements indicate what you have? Mk1, 2, 3, 105, Gary Robinson Regrind, Joe Bloggs profile. The possibilities could be endless.
cheers, Delboy