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That’s not a graphic display. This is what it looks like in operation:
It’s basically a dot-matrix, apparently using some form of plasma? From a closer look at the grid
I think it might be like a Nixie matrix like this one:
But older, less refined.
That red dot display reminds me of something I saw in the late 70s but can’t recall what. Was it commonly used on other devices?
While I was looking for information about the display I found a lot of references to similar ones used in pinball machines
so maybe that?
Today they’ve mostly been replaced by LED panels.
That is probably it. Thanks