This is a beautiful watch but it was too big when it arrived so I took it to a jeweler. He told me that you need a special tool to take the group apart. I ended up having to go to Tournai, but even they didn't have the right instrument! They were finally able to find one and fix the strap, but the clasp on one side keeps popping open. I'm scared of losing it. I don't want to return it, it's really nice. I don't know what to do.