The sight in my possession is as Mike in NC describes. The S font is very slightly different. Side mill marks are completely different and are circular emanating from the pin hole. The upper corners of the base are slightly less rounded. The S is lightly stamped and slightly cocked counter-clockwise. The S is also very slightly forward of being centered under the pin hole. The short sight blade is WI stamped on it and it is slightly cocked clockwise
"Socialism is the Philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery." ~Winston Churchill