This listing is for a NOS Tung Sol 1626 vacuum tube.
These triodes were made in 1942 for the U.S. Navy. As I understand it, they were used in military radio equipment.
I have several, so feel free to buy as many as you wish and save on shipping.
They may or may not come in the original boxes you see in the photo (some of the boxes were in poor shape and, as such, I have more tubes than I have boxes — I will substitute a modern box though when packaging).
I have no tester to be able to test them.
For my own hi-fi amplifier projects I selected a few at random from this same batch and they sound as wonderful as they would have back in 1942. Since mine were from the same batch I assume that these too are in as excellent condition.
You are welcome to return them within 30 days if you find issues with them.