Mine looks like those ron it has end caps, I can get brushes for them, one of my suppliers sells standard size brushes.
Its obviously designed to last it has ball bearings.
I think it'll probably gather dust rather than be used for anything.
I used to know a junk yard owner too, right next door but like a lot of businesses in the UK the goverment has hsut him down with legislation.
I have a couple of valve car radio's, these dont have a rotary, sorry dynamotor, they have a synchronous vibrator, and interesting device in itself.