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Chris those are always tough and have been discussed here previously. Potentially what you are running into is a small flake of meter paint has dropped into the movement. These older meters do start to flake. Also a small bit of dirt or metal may have made its way in. It can even be a hair. Typically it requires the removal of the meter and then getting the movement out of the?case so?that all sides of the?meter can be looked at.?

Then in a very clean area not the typical work bench see whats?up.

Things like small bits of paper to work the grunge?out work.

Nothing metal. If something actually has happened to the?jewel thats?a big problem. Do not mess with those?small screws as tempting as that is.

Good luck

Paul

WB8TSL