I have a Seiko watch and am thinking about ordering one of those special tools that I can use to open the back of the watch case which has six slots in the periphery. I’m thinking about doing my own battery replacements - as opposed to taking it to a jeweler.
Anyway, what are the dangers of doing so? Can I ruin it? Is the torque of sealing the watch critical?
And what’s the difference between a Swiss movement and a Japanese movement? In watches, that is.