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(!!) 5751 Sylvania misbranded 12AX7WA NOS 1960's (1.9/1.9ma)
(!!!!) (Slightly microhonic Single) 5751 RCA Hewlett Packard black plates NOS 1968 (2.4/2.6ma)
(!!!!) (PAIR) 5751 Hitachi Japan glossy black ribbed plates triple mica double D getters 1960's (2.0/2.2ma and 1.8/2.2ma) (rare)
(!!!!) (Best Single 1958) 5751 Sylvania black plates triple mica D getter halo 1958 like new (2.5/2.3ma)
(!!!!) (Recommended Pair) 5751 RCA black plates low hours/test like new 1961-1962 (2.5/2.5ma and 2.7/2.4ma) (Best Audio Grade 5751) (same Gm)
(!!!!!) (Recommended 5 Star Single) 5751 GE "5 Star" gray plates triple mica "O" getter 1960 like new (2.2/2.1ma) (same Gm)
(!!!!) (Recommended Single) JG-5751WA GE black plates triple mica D getter 1958 like new (2.6/2.6ma) 1% section balance
(!!!!!) (Recommended 5 Star Single) 5751 GE "5 Star" gray plates triple mica "O" getter 1959 like new (2.5/2.4ma)
(!!!) (SINGLE) 5751 Hitachi Japan glossy black ribbed plates triple mica double D getters 1960's (2.2/2.6ma)
(!!!) (Best Single) 5751 GE 5 Star NOS 1975 (2.4/2.4ma) 1% section balance
(!!) 12AX7 Baldwin Sylvania "D" getter used/tests like new 1959 (1.9/1.9ma) 1% section balance
(!!!) (Best Value Single) GL-5751 GE "5 Star" black plates triple mica D getter 1955 era used/tests like new (2.3/2.4ma) (Gm like new) 1-2% section balance
(!!!) (Best Value Single) 12AX7 Baldwin Sylvania "D" getter used/tests like new 1959 (2.1/2.0ma) (Highest mA and Gm) 1-2% section balance
