I just came across a NEO-8000 planar neon display in less-than-perfect condition. In fact, this is easily the worst condition tube in my entire collection. I’ve never seen the cathodes deteriorate quite like this before. It looks like a bad horror-syfy-original-movie digital font.
What makes this tube odd is that the center supports in the middle of the digit are missing and the giver that is normally in the upper left corner is missing too. Additionally, the back of the display is transparent instead of the usual black finish. I cleaned the tube but the cloudiness is actually inside the of the display.