mark392001:  Your research is correct about the Sedgley "s" mark on the barrel of your Krag sporter.  It appears Sedgley converted some Krags into low cost sporters by recycling GI parts in novel ways to keep costs down.  Your carbine rear sight is probably worth a couple of hundred dollars.  (Unfortunately a square notch has been filed into the pivot end of the 'ladder').  Still, this sight is in greatest demand of the Krag rear sights.  You might consider replacing it with a more common rifle version.  Your reused front sight is a neat feature on your shortened Krag rifle barrel.  I can't comment on your stock because your photos don't show it completely.  There were no sling swivels originally on carbine stocks and carbine barrel bands are solid and retained by a flat spring inletted into the forend tip.  (My Sedgley sporter is marked on the receiver ring, has a recycled & rechambered,1905 dated, Springfield barrel, and a crudely reshaped & repaired Krag rifle stock).  Enjoy your Krag;  you have a neat shooter/sporter!