Hi up for consideration is one 6F8G / VT99 tube , seemingly unused
It appears to be made by Sylvania , an early type ,marked only as 6F8G but Sylvania VT99 are built Identically.
what you are buying is one tube , it tests 16 and 11.6 , over 100% each section
The Tungsram box may not be original , but its how I got it .
thanks for looking.