Tinker, I don't know about the dovetail. My first guess would be an aftermarket item, but the barrels seem to have the original blue and the recess for the dovetail is blued along with the barrels. I don't have a picture at the moment of the sites, but there is a silver metal mid bead and an aftermarket looking white elongated front bead. Barrels measure 28" on the nose. I have not been able to get the buttstock off as the screw slots are thinner than the screwdrivers I usually use on British guns.
