Mullard CV4004 ECC83 M8137 Box Plate Valve Tube Halo Getter NOS 641 R1C5 (V30)

Modern Logo M8137 CV4004 ECC83 Valve/Tube. Grey Box Plates & Halo Getter. Fully Tested on Avo VCM 163.. 100% Book Spec = Ia 1.2 - Gm 1.6. This Valve Tests = Ia 1.5/1.3 - Gm 1.6/1.5.