Re: Repairing electromagnetic bell
First of all check for continuity between the right hand terminal in you photo and the pillar above and to the left of the other terminal that carries the fixed contact of the make-and-break. It's possible the problem is just dirty contacts on that pillar and the armature.
The coil could easily be rewound by hand. Many of us made electric bells from scratch when we were younger and wound the coils. It's not very critical. Just count the turns as you unwind it, use the same diamater wire and wind it on as neatly as you can, trying to get the same number of turns on. Oh, and wind the coil the same way as it orginally was.
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