How long is the cleaning rod on this one? Is the rod simular to the carabine one? If so, that and looking more into the pictures I will say that this one must be a krag from the "production" after ww2, where krags were assembeled or revised with Stomperud barrels. It look pretty good, almost not used. They were some rougher in finish (mostly the stocks) then those made years earlier.
Take well care of it.