banjodave:  That is a wonderful looking Model 1898 Krag Rifle.  I hope the bore is as good as the outside of your rifle.  Your rifle was probably built in December 1900.  The "headless" cocking piece is probably correct on your rifle, and unusual.  Your rear sight is the model 1902 and probably a correct 'update'.  If the interior is as niece as the exterior, I'd value your Krag at $1250 to $1750.  IMHO