I was recently given a Schatz electric torsion clock and could do with some information. I hope someone can help me with it. It's a torsion clock similar in appearance to a type 53, and is date stamped "11/56" When I got it, the battery holder was badly corroded so I fitted a new one and now it runs, although it does occasionally flutter. But I can fix that. The problem I have is that I can't find any information about it anywhere apart from a YouTube video which doesn't help much. There is an adjustment lever on the backplate, and I would like to know what it does. It's graduated and marked + and - and is connected to an open hairspring which I surmise is the mainspring, but the function of the lever is a mystery! Can anyone tell me what it's for? Any help would be greatly appreciated!