Mullard KB/QDD CV4003 M8136 ECC82 Box Plate Valve Tube NOS 631 R7H2 (V32)

Mullard KB/QDD CV4003 M8136 ECC82 Box Plate Valve Tube NOS 631 R7H2 (V32)
Mullard KB/QDD CV4003 M8136 ECC82 Box Plate Valve Tube NOS 631 R7H2 (V32)

Mullard KB/QDD CV4003 M8136 ECC82 Box Plate Valve Tube NOS 631 R7H2 (V32)
CV4003 M8136 12AU7 ECC82 Valve Tube. 631 R7H2 Code in the Glass.
Mullard KB/QDD CV4003 M8136 ECC82 Box Plate Valve Tube NOS 631 R7H2 (V32)