GE 6386 Vintage NOS Black Plate Disc Getter Audio Tube (several available)
All tubes show two date codes. One is a 1968 date of "68-06" and the other is 1970 date code of "70-30". They feature black plates and a disc getter. Audio Rectifier Tubes (5Y3, 5U4, GZ34, etc). Yes, it's that simple!