It windes 4 watches. It seems something in the box has slipped and only 1 of the 2 watch rotating dials is rotating. How do I get into the box to fix it?
Presuming there is a circular area on the right and left side, the mechanism will probably pry out from the front of the unit. Carefully pry out from the outside of the trim ring. Most likely, there is a small belt inside that has broken.
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Try fixfault.com to fix wrist watches.