I will try to add photos of my after clean-up and answer ? NOS is an auto part that is "new old (original) stock" in this case I mean a original 99 stock in better condition.I have cleaned the bore with #9, I buy it in Qt jugs and it looks good, not mirror but clean with some frosting in the groves.  Also the butt has the 3 holes for the cleaning rod in the trap. The SN# is 355060. Thanks for you comments as this is my 1st Krag in many years of C&R collecting. Seems like I don't know how to post Pics in this forum.