Agreed. I bought a set of IN-18s for 30USD each back in 2009, now they go for over $100. I finally designed and built a clock for them about 3 years ago, and i

Agreed. I bought a set of IN-18s for 30USD each back in 2009, now they go for over $100. I finally designed and built a clock for them about 3 years ago, and it sits right under my main monitor. They are captivating. I added “tasteful” (IMHO) digit cycling effects and a PIR sensor to turn off the display when no one is around to prolong the lifetime of the tubes, but your experience with the longevity of your IN-18s is remarkable. I’ve always wondered what equipment they were originally designed for, given their size. Most likely military I imagine, or maybe public signage?