Aiming Circle 31.
Richtkreis 31 (RKr.31) was tripd mounted & used for measuring horizontal and vertical angles in the preparation of data for MG34/42 & light artillery indirect fire. Could also be used for flash spotting.
The scope & base are in very good condition, with original paint & are maker marked - 'bmj' for Hensoldt & Sohne Werke AG, with matching serial numbers - 451556. The original carrying box has a white paint makers code 'cme' & a now illegible white paint Waffenamt stamp in a rectangle. Good condition, with normal wear & tear for its age.