Looking at the insignia on the collar with a 10X jeweler's loupe it could be a NN, not certain though. There maybe a larger version of the same photo else where, my wife is still looking. This grandfather died 10 years before I was born so I do not know much of his history. He was working on the Fred Harvey Ranch in northern Arizona when he died in '43. In his later years he became one of Jehovah's Witnesses.
The original Krag that I have came though him, it was my father's and he gave it to me in his later years. My father was pretty upset when he saw the sporter from my mother's father, my father thought I had messed up the rifle he had inherited. Took a while to convince my dad that his was unmolested.