6CN7 Tube Made in USA (Brand Missing)

Unknown brand, made in USA, 6CN7 tube, tested good.

This tube has been tested on a Triplett tester for emissions, leaks, shorts, etc. and tested good.

I am listing this tube as used, though it may actually be new. This is from a huge batch of tubes that were mostly new, but some had been put into white boxes because their original boxes had lost their rigidity. So expect a used tube, and if it turns out to be new, it's a bonus for you.