As for Cinderella-fitting batteries to an empty opening - googling for the movement’s brand and caliber will usually get you the correct battery size number. Caliber is usually marked on the movement, where you can see it.
As for Cinderella-fitting batteries to an empty opening - googling for the movement’s brand and caliber will usually get you the correct battery size number. Caliber is usually marked on the movement, where you can see it.