Mullard (GE) 12AX7 ECC83 i63 Vintage 1965 NOS Short 14mm Plate Audio Vacuum Tube

It features a 1965 date code of "B6K4" with short gray plates and a round getter. The white printing is in great shape and displays well. Minimum Gm (70%) is 1.1 and NOS spec (100%) is 1.6. This tube is perfectly balanced at 1.9/1.9.