BASF Bobby? hubs

I had often seen photographs of these on the Internet and audio web sites but I have never actually seen these. A delivery came in from Germany and there was a pair there.

They seemed much larger than the ones I have seen, maybe they make different sizes for different machines, from what I guess these are used Horizontally.

About 10cm wide

These have some slight corrosion on the tops and sides which will buff out fine, more underneath but that's not seen. I think these are called Bobby hubs in the trade but also not sure.

Interesting item