bonanza, just in case you don't know already (I found out only four days ago): The scope on your rifle is a very rare variant of the Hensoldt, Wetzlar 2 3/4 x "Ziel-Dialyt" from the 1930s. The adjustable rings at the front, objective end are not for focusing as in American target scopes. Instead they provide semi-internal windage adjustment by an excentrical objective lens. So when sighting in, set the adjustment on zero at first. Then, using the windage adjustment of the Griffin & Howe sidemount for coarse adjustments, shoot the rifle until you are reasonably "on paper". Now the windage adjustment ring, after loosening the front locking ring, may be used to make final windage adjustments. Up-down adjustment is, as usual in older German scopes, by turning the turret on top of the scope. Turning clockwise makes the rifle shoot higher on target. Focusing is done by turning the ring between mount and ocular bell.