Hi butlersrangers.I read over in the Mallory book on my sight.From his book it appears that my 1894 Krag S/A rifle has a 1896 rifle sight.Left side of base (cut off side) has 300-600,faint 650 yard mark. Right side has 16 lines indicating every 25 yards as per page 125 of Mallory book.Ladder is marked 700-1800 yards.I think you use the front edge or the horizontal bar as you slide the bar on the base to set your target distance from 300-600yards. The end of the base would be at 650 yards.Therefore the 100 yard range would be ladder down and horizontal bar set all the way back to ladder hinge.Sight notch at B ( see above)previous post from cjwils
I think I understand. I will post some pictures soon.
Thank you all for your help on my education.
Dave  :)