The only real damage is the lower 2 fingers of the stock head look to have been the recipient of too much barbed wire fence crossing. It is only the last 1/4 - 3/8 inches that are buggered up so not much to fix.
The wood is very, very tight grained and looks to be more like English not black Walnut.
Anyone want to sell me or share some small wood scraps that I might be able to get a repair piece from? I have some scraps but from some much more open grain black walnut.