
http://www.ussrphoto.com/UserContent/1672009_C-215box.jpg
The three main units in the box assemble to make the two devices shown below. They appear to be for viewing through a wall. There is abutton to open a shutter in order to view. The angle of view is about 100 degrees.

http://www.ussrphoto.com/UserContent/1672009_Combi1.jpg
I am puzzled by the two remaining items in the box, which are shown below. The black circular device has a locking screw in its centre and its outer thread screws into the white collar of the other device. It will screw in either way up, as the pictures show.

http://www.ussrphoto.com/UserContent/1672009_Combi2.jpg
The handle has a spring loaded pin that will locate in any of eight holes, but this does not rotate the device in the white collar. The rectangular plate is drilled with four holes to attach to something, but what? I would much appreciate any suggestions.
David.

