Original MARCONI VMS4
RENS1214 E445 used tube
Screen-grid tetrode
made by Marconi in Great Britain in 1930's
The tube is used, tested with the great more than 100% result:
Ia = 11mA
where 100% for the new tube is 8mA
the tube is in a great electrical shape.
the tube has Europe 5-Pin (O5A, B5) base, top contact screw type
you will get the tube you can see at the pictures
I always send the tubes by priority registered mail with tracking number within hours after receiving payment