1/pr Western Electric 300-B vacuum tubes in original wo...

This listing is for an original pair of Western Electric (second production) 300-B vacuum tubes in their wooden case with the spec sheets etc. They were just tested 2 days ago on an Amplitrex AT1000 tube tester, considered by many tube enthusiasts to be the holy grail of tube testers. One tests a...

This listing is for an original pair of Western Electric (second production) ...