Here is an awesome single RCA red base 5692 / 6SN7 tube. Please look at all actual item pictures carefully to know about detail of item.  Will be well packed and insured. 

"remove the white lettering"

Tube tested from : Amplitrex AT1000

Tube 1 

Plate 1 : emissions 97% and GM 84%

Plate 2 : emissions 102% and GM 88%

Thanks again for looking.