Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)

Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)
Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)
Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)

Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)
CV4004 ECC83 M8137 12AX7 Box Plate Valve Tube.
Mullard KB/D CV4004 M8137 12AX7 Box Plate Square Getter Valve Tube NOS (V22)