The Repair Shop?

On 3 February 2017 I blipped a note about the clock we inherited which belonged to an ancestor.

It is a kitchen grandfather clock and since we got it working some years ago it has been very reliable.

The other day it began to stop every hour or so. We’ve tried to clean it and remove dust etc. And while I have worked out which cog tooth seems to stop at the same point I can’t work out why.

A case for The Repair Shop?