Chime/strike problems

1930 haller mantle clock that has decided to strike 12 chimes every hour

Hi James

Hope you don’t mind me asking some advise, I have a 1930 haller mantle clock that has decided to strike 12 chimes every hour ….  You did a video on YouTube and I was wondering if you could offer some advise as to how I may  be able to repair this it would be greatly appreciated. I am a locksmith so are used to small mechanical works

Any advise would be greatly appreciated

Thanks

Darrel