rocky mtn bill, I suggest you look for the Lyman 48 that has the hinged peep on the front of the threaded hole the aperture screws into. This was the sight that came on the 1903 NRA Sporters. I deer hunt with an NRA Sporter using the original iron sights. I just aim through the threaded hole as that is plenty accurate for the distances I would get a shot in the woods. The hinged peep was an interesting idea that, IMO, had limited usefulness. Some gun writers back in the day even suggested it be removed from the site lest it be half turned down when an opportunity for a shot occurred. Still, I like the idea of the instantly available aperture sizes. It is easy to recognize this Lyman 48 as the front of the threaded hole has a milled out place where you can take a fingernail and catch the top of the hinged aperture (peep) and turn it down.
