One Mullard used tube in original Amperex tube box. I've been selling off my entire tube collection bit by bit. Labled Amperex but made in Blackburn England tube code KM1 B1K3,  1961.   All my EL84's have been tested on a Maximatcher tube matcher. .This tube tested 35.1 / 8.1  I will combine shipping on multiple tube orders. I  ship USPS Ground Advantage  to lower 48 states only please.