(!!!!!) (Best Single #1) 12AU7 Mullard UK "long plates" and "O" getter 1958 low hours/like new (10.8ma and 11ma) (High mA and Gm)
(!!!!!) (Best Single 1958 #2) 12AU7 Mullard UK "long plates" and "O" getter 1958 used/very good (9.4ma and 9.6ma)
(!!!!) (Best Bugle Boy Single 1959) 12AU7 Amperex Bugle Boy England (Mullard) long plates with "D" getter like new 1959 (12.4/9.8ma)
(!!!!) (Bugle Boy Single 1958) 12AU7 Amperex Bugle Boy Holland long plates with "D" getter 1958 used/good (7.8/7.0ma)
(!!!!) (Long Plate Single) 12AU7 Mullard Heath UK long plates "O" getter used/good 1959 (8.8/9.0ma)
(!!!!) (Single) ECC82=12AU7 Philips Miniwatt Holland "O" getter 1965 (11.5/12.0ma)
(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (10.0/11.6ma)
(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (11.8/12.2ma)
