These are vintage Marbles front sights with a brass tip. All are in very good or better condition. Some sights are marked "Marbles", some are marked "Marbles" and "Sheard", and some are not marked.
Heights are measured from the bottom of the dovetail to the top of the sight. The "N" models are 0.250" wide (at the dovetail), the "M" models are approximately 0.338" wide, and the "W" models are 0.355" wide.
41N, W, or W - 0.412" high
37M - 0.377" high
31M - 0.315' high
45M - 0.445" high
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE
