My son does watch and clock repair on a full time basis. Hallicras Works A few years ago, someone gave him two Greiner watch timing devices.  I have a background in electronics, but my skills in vacuum tube circuits is a bit rusty.  Finally found some time, motivation, friend to try to get them to work.  After some minor cleanup, they look to be in good condition.   No obviously failed electronic components.  They must have been expensive machines when new.  They are really well engine