Pretty much impossible to tell from those photos. The receiver does appear to be the older black powder frame, which should have been case hardened not blued. The photos make it look as if it is blued. Also, the edges of the loading gate cover seem to be buffed. If the receiver is blued, then the gun has probably been re-blued, which would substantially diminish the value of the rifle. However, the photos are bad and I could be mistaken. How does the stamping on the barrel look? ..... sharp or buffed? There should be no blue on the muzzle of the barrel. If there is, then it has been re-blued.