Anyone familiar with these vintage touchscreens?

[Peter Corlett]

On Sat, Oct 19, 2019 at 02:23:46PM -0400, Nigel Johnson via cctalk wrote:
> Judging by the year, it was probably a teletext terminal. [...]

It's not Teletext, unless that word means something different on the other side
of the Pond. Teletext was basically a text system (the hint's in the name) with
graphics (and indeed colour) being a weird hack that gave it a particular
appearance, especially in typical implementations which used the SAA5050
character generator chip.

The palette and colour fringing suggest Apple II to me.