I have a 1930's vintage Heym Heeren single shot that is wearing an equal vintage Zeiss Zeilklein 2.25x scope in contoured 7/8 inch dovetailed mounts that really look like they belong there. The scope with a cross hair and sharp tapered post in vintage terms could be described clear as a bell and sharp as a tack. Of course it is vertical adjustment only but the dovetailed mounts make the horizontal easy for what would be a hunting rifle (or in the war, on a sniper's rifle).