Another great catch Detlef. The fur looks to be that from a young Philippine warty pig, and the ferrule as Kino has mentioned looks to be made from a Remington shotgun shell casing. I cannot be positive, but to me the material on the blade next to the ferrule look like a solder repair made to help keep the ferrule in place. If you look closely (photo below) you can see on one side where it looks like it has been soldered and the solder has been run up and onto the brass ferrule itself. This is not something that you will see when welding. Brass will flow onto steel, but steel will not flow onto brass in the way shown in the photo. As far as age, I think that I will wait to see better photos before commenting in that area. My only other comment is to say that I wish that I had seen this first.
Best,
Robert