Thanks for the further thoughtful information. If consistent, the rifle sight seems to have a smaller aperture and a larger slide screw on the left. These are clues I'll look at.
I have looked at the slide under 10x mag and don't see any remnants of a "c". I'll look again just to triple check. But the two clues above, if consistent with these respective sights, should differentiate them.

Appreciate the info.

Culpeper- I'm in southern, Ohio now. Used to live in Ellicott City area and visit Frederick all the time with a friend. We have shot together in Frederick since college days in the early 80s. He doesn't have the land anymore so it's only on ranges in Frederick, now. We have lots of long distance shooting land where I live as well as historic firearm shooting at our member range. Krags are always welcome!