A few 6SC7 pre-amp tubes from the 40's and 50's These were used in radios and PA systems and lots of other things. I have them because guitar amps from that period use them too. RCA was huge then. Some of the very best tubes ever made. These keep going up in price as the last ones slowly but surely get purchased. I'm lucky I bought them back in the late 90's and early 2000 era.
Tung-sol is another great manufacturer from the era. Vacuum tubes are still made in a few factories here and there but the quality is dodgy at best and availability is always a crap shoot.
These military ones come in the coolest boxes that unfold like origami while protecting the glass from breaking.
Don't forget to read the fine print ;)
They also came in metal covers. Maybe to protect it or maybe more so that they wouldn't glow in the dark... Air raids were a thing to worry about then.
I got a little too close on these shots
