With BTH Kc1 magneto, looks to have been apart for some time, some of the parts are good and with careful restoration can be used, some of the parts are not so good and may need replacing, or repairing, as you can see there is no number stamped on the casing, must have been factory replacement at some time? Some of the alloy will clean up well with a little work, some things will require soaking for some time and patience, it is not fully complete! Rare engine.