Mullard KB/D CV4003 ECC82 M8136 Box Plate Valve Tube NOS 631 R7E2 (V40)

Mullard KB/D, Made in Great Britain. M8136 CV4003 12AU7 ECC82 Valve Tube. Box Plates, Halo Getter, Dual Printed. 631 R7E2 Code in the Glass. Fully Tested on AVO VCM 163.. Ia 10.2/10.3 - Gm 2.3/2.3. 100% Book Spec = Ia 10.5 - Gm 2.2. New Old Stock, Supplied in White Box.