Rare Mullard ECC82 12AU7 Long Plate Valve Square Getter 1593 J4 Code Used (V21)

Rare Mullard ECC82 12AU7 Long Plate Valve Square Getter 1593 J4 Code Used (V21)
Rare Mullard ECC82 12AU7 Long Plate Valve Square Getter 1593 J4 Code Used (V21)

Rare Mullard ECC82 12AU7 Long Plate Valve Square Getter 1593 J4 Code Used (V21)
1593 J4 Code in the Glass. 100% Book Spec = Ia 10.5 / Gm 2.2.
Rare Mullard ECC82 12AU7 Long Plate Valve Square Getter 1593 J4 Code Used (V21)