If you don’t know what a nixie tube is your in for a treat.
Before LCDs, LEDs, OLED or e-ink there was the cold war glow of nixie tubes. The technology hit its height in the 1970’s and most production of them ended sometime in the 1980’s there isn’t really anyone making them. Except for Dalibor Farný.
He has spent a lot of time and I would assume money to remake these wonders of the past. The video on his youtube channel takes you through the whole process of how he makes them today. It is a treat to watch.