No expert, but it really depends on if somebody---a collector wants to buy it. Could be up to $20K, but that's all original stuff. Anyone who is going to buy a Knuckle will know or should know what he/she wants. If you have picture, I'm sure someone can get you a closer price.
War era Knuckleheads are pretty rare and can command a higher price than other later ones. Much depends on condition and how complete and original it is.
Assuming it's basically complete and correct it could go anywhere from $15,000 to $30,000.
44 knuckle
