Ross, I don't know if anyone can truly confirm a timeline on this question. I'm of the feeling that if you need a peep sight on your rifle to hunt with, or partake in shooting matches where they are allowed under the any metallic sight rule, then by all means use it. The peep sight you describe sounds as if it would date to one of the earliest types, and one of the more simplest designs, a rather straight forward no non-sense design. :lt th