replying to Joe, StingerMac wrote:
On my Mititoyo dial calipers, I can take the screw that holds the plastic
bezel in place all the way out. I then insert a clean wire preferably a little
thicker than a paper clip into the exposed slot. After sliding the caliper
open to a point where the needle is at 12 o'clock position, I push the wire
all the way in to disengage the needle from the teeth on the hidden toothed
rack. I hold the wire pushed in and slide the caliper closed. Then remove the
wire. It my take several tries to get it perfect.

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