Werner, is the fourth photo in your post #17, a rear hub? If so, it looks to be quite bad. I have just converted the hubs on one of my cars to modern roller bearings. The original hubs on my car weren't as bad as what you have so I think yours need attention. The vendors sell a repair kit for the rear wheel bearings but I don't think they are very good. They rely on using the rollers from a V8 car and the reproduced ones of those are of poor quality. So are some of the sleeves for the trumpet and hub.
If you like, send me a PM with your email address and I will send you an article I wrote about my conversion which explains exactly what I did.