You appear to be correct. On another forum someone suggested that they were Swedish Mauser barrels and I believe I've confirmed that.I believe we can be pretty sure they aren’t K98k barrels, but what’s the overall length? from what the pix show, there are no steps in diameter, save at the muzzle. Is the barrel OD tapered? Diameter of barrel shoulder (ridge next to the threads) and diameter & pitch of the barrel threads would be of some help as well as knowing the barrel ID.
Really?Can't identify this but am sure this is not k98k barrel .