Offered is a rare 6T5 magic eye tube, Zenith branded, but actually made by Ken-Rad. This is a used tube, with decent brightness but less than what would be achieved with a new old stock tube. Watch the video as the tube tester is switched between the "open" and "closed" settings.

Note that there is no type number visible on this tube, but there was only one type that looked like this. Also, there is the number "49" visible in one picture that is inside the tube, not on the outside. I had another 6T5 (long since sold) that had a similar number inside, and that one was marked Ken Rad.

I have made an effort to ensure that the pictures give you an accurate view of the tube in operation. Many cameras give a brighter image than what is actually seen and show little difference between light and dark areas.

Thank you for looking!