Pure gold! I would spend as much time needed to go through all of them.

Few clicks in I found this one: http://www.dvq.com/ads/ncr_321_sa_12_64.jpg

And this is the one that got me searching on the topic (April 1970 commercial of a plotter connecting to a teletype and other sort of terminals): http://www.dvq.com/ads/tsp_dm_4_70.jpg