NSB-1 ZRAK Military Optical Device 60mm
It is used for aiming and taking the tabular and local angle (elevation elements) and direction angles to control mortars in the direction of the target in day and night conditions
Includes 2 extra bubble level tubes and tool (There are two types of tools. The one pictured is the ring handle type. The other type is a hinged bar type.)
Wooden cases look more worn and most have writing in them. The sights and contents are in very good condition similar to pictures.