Hi Colorado John and welcome to the forum,
Your cool looking sporter krag appears to be an 1896 Krag that was produced in June of 1898.
FWIW: Your Krag doesn't appear on the list of 'Serial Numbers of Known U.S. Krags' in the the back of Mallory's book 'The Krag Rifle Story... However, it is in the company of known 1896 rifles.
Your Krag may have a cut-down rifle barrel and has had the original Krag front sight replaced with a 1903 front sight.
The rear sight seems to be an 1902 model.
The stock looks like an 1896 rifle stock that has been shortened and embellished with checkering.
By the looks of your Krag it could have been modified by one of the early military surplus companies in operation at the turn of the century.
Companies like W. Stokes Kirk, Bannerman and Sedgley.
Listed below is a link to a an example similar to yours:
(You need to Login to view media files and links)Hope this info helps answer some of your questions... Have fun shooting your prized heirloom.
BTW: Measure the barrel length, when you have a chance, and look at the muzzle crown to see if it's flat or rounded?