B36 12SN7GT Marconi Valve Tube Metal Base Balanced Anodes NOS

Acid etched B36

Metal base

Grey glass

Square getter

Black ladder anodes

Marconi sticker

Made in England

Original Marconi box

Balanced anodes

Test results:

A1 – 10.5ma 2.8gm  A2 – 10.5ma 2.8gm

NOS