Very rare tube Mullard Blackburn ECC83 /12AX7
Early Mullard ECC83 type Great Britain
17mm long plate,goalpost square getter,copper rods
Code : mC1 B7C (year 1957)
Very good condition
Tested on Roetest V 10.1(see last picture for results) and RM1 tube testers made in Germany
RM1 tube tester (1.2mA = 100%)
Tube : 1.02mA / 1.2mA
no shorts no gas
I will pack
the tubes properly(in a wooden box), and will take great care in doing so
PRICE IS FOR
ONE TUBE