@hjlong3 wrote:

A good methylmethacrylate glue such as Super Glue, Krazy Glue, or Gorilla Glue will frequently work. Do not try to solder it… the pewter will melt at a low temperature and the bell will be ruined beyond repair.
Harry Long, MD

I would discourage Gorilla glue. It is a foaming and expanding poly type. Would make a mess. The methyl……. a/k/a CA glues are a good reccomendation. Or one of the metal weld epoxy types would be excellent. You would only need a very tiny amount.
Nice bell. Too bad about the damage. Happens.