I have a great deal of fun using one of these copy cameras every few years. I set it up to run off of an idle stove circuit breaker for the owner and in exchange I call, and get useage rights.
I use it to make neat photo collages and high contrast multiple image assemblies. If you have never played with lith film this beast is the tool to open that door to you.
Dig up the old graphic arts photo guides. Get used to the concept of vaccuum backs, pre flashing exposures, and living with part of your basement lit in red safe light.