This is a swiss army watch I recently was given by a relative to repair, and I’m certain this is a screwback case but how do I actually remove it? There arent any notches for a watch wrench to remove it, so do I use a rubber ball?
Might be able to do it with a rubber ball, depends how tight it’s on there vs how strong a grip the ball can get. Professionally, this would be done with something like https://www.cousinsuk.com/product/rolex-dies-6-with-wrench
Failing that, it’s the same type of back as Rolex, so look up how to open Rolex style case backs for other ideas.
And stupid question, have you checked it’s not a snap on pretending to be a screw on?
You can try a rubber ball. If that doesn’t work, you need to buy a case back wrench with Rolex-style dies.