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A replacement moon disc pusher also known as a nodding donkey, missing from a Thomas Lister 30 hour
brass dial long case Clock.
Notice that its post or stub arbour is riveted through the
dial plate, I can only assume this post had broken at some
stage and all of the items were discarded. This is a good
system as it is pushed from the bottom of the tooth and is not
as critical to damaged tooth tips as other systems.
A recommended book on this
subject is MOON Mechanisms by
Peter Grimwood.
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