I don't have a micrometer (probably should buy one!), but I have a couple of Verniers. I also have an original ABEX gauge. If there is a particular dim on the gauge you'd like verified against the ABEX THG-801, I can check?
EDIT: I presume you have seen this:
https://www.youtube.com/watch?v=q86T8KC0kWc&t=300s