In Reply to: Re: Generator parts for early 9N? posted by JP on November 27, 2018 at 15:48:39:
Looking at your pictures, your is an earlier car generator, 81A-10000-D. It did indeed use the 17mm armature as the parts diagram shows armature nut as p/n 351124-S; .6693"-20 from my 28-38 Chassis Parts information. Thus a "B-5" date code would be a 1935 part.