Up for sale here is this NOS NIB Philco 6A3 tube, dated the second quarter of 1936 and Made in USA. This has black plates, top springs, and an engraved base. It was tested by a previous owner, probably on a TV-7 tester, and tested at 44, where 38 is minimum good. This is guaranteed to work great for you, and would sound fantastic in your vintage gear. 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 more tubes and other vintage electronics listed--feel free to take a look!