[Arran]

Actually I disagree about AC operated electric clocks, short of a power failure, all of the ones I have had seem to stay 100% accurate. I'm not speaking about the electrically wound clocks like some of these long cased clock radios used but the ones that used a Telechron type mechanism governed by power line frequency. The battery powered clock mechanisms are always having problems, the battery gets tired and the accuracy slips, plus the majority are China built now which basically means landfill bound at some point.
It's always a good thing if you can find an original style mechanism of course. You mentioned that a Hammond brand clock uses the same mechanism that this Silvertone once had?
Regards
Arran