I was in Georgia (the country) a few years back and visited a flea market, where, to my delight, several guys were selling a lot of Russian made tubes. I was inclined to buy a few, but didn’t have an opportunity to research the models on the spot, plus the hassle of taking back glass tubes in my luggage was eventually not worth it.
Still, it’s endearing to know that they’re still around, apart from maker projects and overpriced retro hardware.
Preliminary evidence for one-trial social learning of vervet monkey alarm calling