Mitutoyo Series 103 Mics are Off A Lot! How to Fix?

I have these two Mitotoyo .0001 mics. A 1 inch (#103-135) & a 1-2 inch (#103-136) mic. Both are off of their zero point by a lot. I suppose I could rotate the sleeve with the wrench around to line up the zero lines. But thinking that either the female threaded sleeve, or the spindle of each, was somehow rotated to the point they are now. As you can see the 1 inch zeros out at .008 and the 1-2 inch zeros out at .013 (on a 1 inch standard).

The graduated sleeve attached to the micrometer frame is exactly where its supposed to be on each. The measuring faces are nice and clean, and under magnification appear to be square to each other. These mics came in a toolbox lot I purchased so don't know their history.

Looking at the exploded view, it looks like the female threaded sleeve is somehow locked to the frame, not meant to be disassembled since its all one p/n. So thinking that the spindle has been rotated. In the exploded view it looks like the spindle can be removed. And with a taper on its end it seats into a taper on the ratchet end of the thimble? I could remove/rotate till I got the zero points close.

Interestingly enough, if I switch the thimble/spindle assy's between each the zeros are off by about .002. Parts are same p/n between the two so doing that would certainly make the mic useable. But would like to get the zero points back to where they are supposed to be.

Can anyone whose been inside of one of these mics advise on how to get the zero back where it should be. Thanks

Mitutoyo 103 Series Micrometer Exploded View PDF

I would be concerned that these have been strained which would mean that the faces wont be parallel ,not easy to check properly without specialist calibration equipment as far as I know but you might be able to prove that it is out by griping a pin in different places on the anvils.

Under magnification, the faces appear to be parallel. Yea I know, optical flats are really used to check them, but don't have any. I used the 1" to measure some smaller gauge pins and the faces don't push the pin around when I try to move them around. So I feel like the faces of each are reasonably parallel.

I checked the mics on a couple gauge blocks across their range and they measure consistently. So I don't believe the threads are worn. And the tension on the screw does not vary over the range of each mic. As I don't know their history I have no idea how they got to that point. They appear to show only light normal wear.

These will be used in a home shop so they don't need to be calibrated such that would be required in a business environment. Just want to get them useable by getting the zero point back to where it should. My mics at work have to be calibrated periodically, but I'd like to use these in my home shop.

There's a bushing inside that you adjust, I believe. Maybe that's just for tension. I've got the manual at home. Twist the body for tenths, adjust something else for thou.

Thermite post-whoring and stating the obvious no real help on answering my question, see last sentence in post #1.

Took a brass punch into the back side of the thimble (ratchet end) and a couple raps with a ball-peen hammer the spindle frees up and drops out on each of the thimble. Reinstalled with the zero point where it should be. Snug it all up and good to go.