Makers name will be engraved or stamped into the top flat of the barrel between tang and rear sight. Did you look there? No one is asking about the rear sight. It is obviously a replacement, perhaps an upgrade. If no name it might be possible to identify a possible maker from the prominent cheekrest. It's a nice, if somewhat late half stocked gun in 'attic' condition. You are fortunate to have it and we appreciate that you brought it here to show it around. It does appear to be an Ohio gun, but could be from further west, also.
Dick