Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V35)

CV4004 ECC83 M8137 12AX7 Box Plate Valve Tube. Box Plates, Vintage Goalpost Support Square Getter, Dual Printed.

Fully Tested on AVO VCM 163. Ia 1.5/1.2 - Gm 1.6/1.5.