Original brochure! Awesome! Very cool! Two position arm rest, though the GM arm rests that folded up into the seat back was a better design in my opinion, which allows for the soft seat to be useful when the armrest was upright. Hard for your back, but easy on your bottom.
This strikes me as a forward thinking tail panel predessesor, about 1 step away from a flat rear panel that the 60's cars all seem to have had replacing the 40's and 50's curved trunks and fender mounted tail lights.