Vacuum tube type 7AK7
The record contains an octal vacuum tube type 7AK7 with eight connector pins.
||Printed at the top of the tube in silver
||Printed in green on the glass. It's possisle the number is only partially visible.
||1307 PG B4J
||Handwritten in green on the glass
||Printed at the top of the tube in gray
overall: 3 in x 1 in x 1 in
Gift of the Digital Equipment Corporation