Yup, there are thousands of apertures in junk drawers across America, including a few in mine. Through the fifties and into the sixties, serious deer hunters immediately mounted a peep sight and threw the aperture into the junk drawer.
Makes for a very fast and reliable arrangement that is plenty accurate enough for eastern deer hunting. It was well into the sixties before scopes became cheap and reliable enough to get general acceptance. Even now, the aperture only arrangement is favored by some hell-and-high-water hunters. It'll still work fine in weather conditions where a scope is hopeless.