[Atlas Sneezed]

Ah. Thanks. How did they work, and what are they called (I’ll check out eBay)?

[Steely Tom]

Beelzebubba:

Ah. Thanks. How did they work, and what are they called (I’ll check out eBay)?

Here's a link.

saminfl:

I don’t think those are rear projection displays. I think the numeric displays are what we called “nixie” tubes.

I can see why you might think that; the slight misalignment of the digits does look like the depth effect seen with Nixie tubes. I hadn't noticed that at first.

I still think they're rear-projection units, based on the quality of the images and their color. The misalignment could be due to misalignment within the projection unit itself. Still, you could be right.