Springs & brushroller
Small black one is the carry handle. Trying to jog my memory it's been a while since I did anything with one of these but I worked on quite a few but they use a boatload of parts, over 200. The other springs that immediately come to mind are wand release, the bin handle, foot release & sole plate (which is not pictured its long and narrow).
I have at least three of these working in my shed. I believe I've got two or three parts units, a bucket of parts and about 4 or 5 motors. Still quite a few complete and operational ones. You'll have to give me a few days but if I have a brushroller in the parts bucket I'll part with it as every other machine has one.
I still run into them at thrift stores up here from time to time.