I posted this pic elsewhere under comments about peep sights on muzzle loading rifles. Though more of a tunnel sight of bent metal, the rifle is identified as by J. Bender, c.1770 though the only J. Bender I can find listed is from Pennsylvania and c.1790. Some later period 'Kentucky' rifles have been found with his locks but it's now thought they were built of reworked with older locks. Who knows.
The tunnel sight with what appear to be small openings at the location of the read sight is unique and i don't recall ever seeing another example built in that fashion. Would certainly help define the sight picture. There was some speculation about a sniper type set-up but I feel that is unlikely. Just a curious rifle sight arrangement.
https://www.bevfitchett.us/modern-rifles/images/3511_23_9-bender-kentucky-rifle.jpg
The tunnel sight with what appear to be small openings at the location of the read sight is unique and i don't recall ever seeing another example built in that fashion. Would certainly help define the sight picture. There was some speculation about a sniper type set-up but I feel that is unlikely. Just a curious rifle sight arrangement.
https://www.bevfitchett.us/modern-rifles/images/3511_23_9-bender-kentucky-rifle.jpg