There were scopes of different lengths that were used with target bases. Apparently Oberlies made this gun to be used with either long or short scopes. By the way, as you can see, Oberlies made his own scope bases and case colored them. I will probably shoot this gun with standard long tube Unertls.
Yes, and most shooters agree that beyond full length scopes, there are several base spacings used for all the others. The standard seems to be 7.25" spacing, (1/4" click), 14.5" spacing (1/8" click) and the other is 21.75" (1/16" click) This applies to most common target scopes like Unertl, Fecker, Lyman, etc.
Stevens probably made a larger assortment of varying scope lengths than any other maker.
