Up for sale here is this NOS NIB CBS Hytron 12SN7GT tube, dated 1953 and Made in USA. I tested this on my B&K 747B tube tester, and it tested at 76/78, with no shorts or grid emissions, on a scale of 0-120, with 65 minimum good. Most SN7 tubes test in the 40-60 range on this tester. This is an awesome tube and is guaranteed to work for you. Please see my pictures for details.

US shipping and handling is $5, and international is $18. If you have any questions, please ask.

I have a number of other tubes & sockets, collectibles, Magic cards, and vintage electronics listed--feel free to take a look!