This rather childish clock has hung on my wall for at least 15 years. Recently, it stopped working. At first I assumed a dead battery but replacing this saw the metal terminals in the battery box break off.
A sensible person would have taken this as a reason to replace the clock for something more grown-up. I am not a sensible person and nor can I be called properly grown-up, so I decided to fix it.
The plan was to replace the old mechanism with a new one bought from Maplin. Work started by carefully levering off the hands and then undoing the centre nut with some thin pliers.
Once I had old (left) and new (right) mechanisms, it became obvious that there was to be no quick-fix. The old shaft was larger than the new so I'd have to fill the hole in the face a bit. Also, the hands wouldn't fit on the new shaft and I didn't want to change them.
Plan B. Since the mechanics work OK, just replace the battery box with a new one epoxied to the back of the face. The wires are soldered to terminal visible on the edge of the circuit board. Happily, this works and I can hope for another few years timekeeping.