An image from an ad from the Jan/Feb 1974 issue of the Journal for the Society for Informational Display.
The edition is pretty light on scientific illustrations and pretty heavy on flowcharts and circuit diagrams… and some great typography. But this ad from Special Purpose Technology Co. of Van Nuys, CA, definitely evokes the high point in cathode-ray screens. (That is, the big glass tubes that old TVs used to be made of.)
Maybe ironically, the ad appears three pages after an article on early fiberoptic technology, the high-speed replacement for copper cable that made broadband internet widely accessible and maybe kinda sorta was part of the same wave of technology that replaced cathode screens with flatscreen TVs. Definitely part of the soon-to-follow HD video revolution.
Some of us still miss being about to see our lines of resolution with the naked eye, the odd flicker of the non-synced screen on film with a different frame-rate.