Caveat emptor: I am not an expert. the 24B you describe is the "Boss Code" (stamped on the lever"boss") The numbers are that of the inspector. The letter "B" indicates that it was manufactured in 1950. As such, I do not think your rifle was originally drilled and tapped for a scope. That said, your rifle is a "shooter" not a "collector". As with most things, value is based on condition. Without good, detailed photos, a reasonable estimate is not possible.