Hello,
in the last days, I have fixed the magnifier with some glue, and filled it with water. Here is a photo which shows the set with and without magnifier lens.
Note that the picture on the on the lens will be much better with dimmed light in the room.
And here is a short video with the set, displaying some historical Sovjet propaganda:
http://www.youtube.com/watch?v=6BsVElvtqMQ
Kind regards,
Eckhard