Here is an awesome Mullard GZ34 tube. Please look at all actual item pictures carefully to know about detail of item.  Will be well packed and insured. 

GZ34 / 5AR4 Mullard.



Mullard GZ34

Tube tested from : Amplitrex AT 1000

A FWD = 4V   A REV = 424V
B FWD = 5V   B REV = 424V


Thanks again for looking.