Original 1920s pendulum for a Favre-Bulle dome clock English market model, the electric 800 jour clock. It was taken from a parts clock as complete as possible. Coil is tested and is 1 k-ohm. I don’t know what to check further if it is still useable. There is not much technique, but I can’t guarantee it is working. The small spring looks okay. Used item signs of use.