I urgently need to clean this case from this newly acquired watch, Onsa Automatic with Felsa 4007 movement. Also the glass is loose and needs to be fixed. Before I fiddle around, I rather ask what to do before, that is what screw to loosen or remove. I had a bad experience on a pocket watch, where I turned to much and the counterpart fell off and I hade to remove the dial to fix that. But here, I think I could even take the screw out completley (?). I also heared, that this, in some cases, should be done in a certain position of the crown (in or out). Your advice would be appreciated.
My guess would be to go to the screw the arrow is pointing at.