Doug is correct. That other TTY is a model 35. 

Thanks Doug and Danny.   I have a vague recollection of the Model 35 but of course the model 33 was ubiquitous when I started messing with microcomputers in the 70s.   Although few hobbyists could afford them! 

I know that ASCII was just starting to come into widespread use in the late 60s or early 70s when this photo was taken,  so it makes sense that it was connected to a more modern system.    The village of River Forest was quite wealthy, being the home of Paul Harvey, the founder of the Mars candy company, and numerous mobsters -   so they could afford all the newest toys ;-)

73, Bob W9RAN