Hi Wally
Maybe not much help, but I did repair a mechanical Waralarm once.
It had what appeared to be some sort of papier-mache case, and the UK 'Utility' symbol stamped on it, so it will have been made as a cheap clock in the WW2 period, or soon after.
It had what appeared to be a Westclox movement -the sort with cast pillars and arbors, with steel cores for pivots