I see your Zeiss Zielklein is mounted with a Redfield Senior base and rings and that someone has cleverly altered the bolt handle to accomodate the very low mounted scope. A very unusual arrangement for a rifle of this type and very desirable. The mount provides the needed windage adjustment for the scope, which has none, and the front base allows the ring to pivot without putting any strain on the scope tube, in contrast to most German mounts with windage adjustment.