Nice photos.
As a novice, I would ask: What exactly is the attraction of having a brass locomotive? If the beauty of the brass metal, polished, were its exterior, then I could see the beauty.
But, it appears that most of the brass locos are covered with black paint, and have a little less detail than the standard plastic versions, which are also black or painted black.
So, what is the attraction or practical benefit of the brass please?
Thanks,
Mannyrock