A polished metal powered floor brush. Wow! That is just beautiful.
I second the recommendation to use HEPA bags. On a couple of my restored vacs, just half a bag of vacuuming using a paper bag left a fine film of dust in the bag and motor compartments. Field strip and clean! No good. Using a HEPA bag solves that. Yeah, it's like throwing a five dollar bill in the garbage with your dust but I suck it up now. I have one working HEPA Q bag I use in all of my Kenmore canisters that use that bag, swapping with a clean bag as I run through the rotation. It's in the white 12A Whimpertone right now. Ditto the 5033 bagged machines where I use Numatic Henry bags ( they fit! ).
You can look at the brushes. I do on every vac I refurbish, but so far I have only had to changes brushes on two of the twenty something vacs I have refurbished. Most people either tire of a vac or beat them to a pulp and abandon them long before they are truly worn out. The vac I posted the refurbishment of yesterday, that cream colored Kenmore 4.1 was beat, even the wheels were missing and one wheel mount damaged from dropping, but when I measured the extended length of the brushes, more than 85% of the brush was remaining. The motor is barely worn even if the vac itself was hammered. However, for the sake of knowing what you have it's worth the time to take the motor out and have a peek at the brushes and blow it out with some compressed air (and be ready for the dark cloud of old dust that will come out, heh, heh, heh, you don't know where that old vacuum has been).