Just noticed this crack on my flask

I have an early 1900’s sterling flask. Once a month I take it off the shelf and use a polishing cloth. Took it down today and noticed it was split open. Can’t tell if it got bumped and knocked off as no one fessed up to that. Can an old sliver flask spit due to age and/or environment (such as humidity) cause it to do this on it’s own? Can it even be repaired? I want to say I paid around $550 for it 3-4 years ago. Thanks for any advice.

It can be repaired if it’s silver, for sure. There are various places that can do these repairs, but one I know from a friend’s personal experience is Jeffrey Herman. He does exceptional work:

Thank you. I will contact him.