Add-on Generator from Early Saxon

[190bear]

I need help identifying and finding parts for this three brush generator that was added to a 1914 Saxon. There is no name plate or holes where one was mounted. 639 5387 is stamped in the body. The four pole shoes are mounted with two screws each. The third brush is adjusted with a screw driven rack and pinion set up. The end plates are held on with four screws each instead of through bolts. It has ball bearings front and rear. The housing is 7" long and the armature 8". The pulley was held on with a key and by a tapered shim pounded on between the shaft and pulley. There is a hole through the front shaft also.

Thanks, as always