(!!!!!) (Best Pair) JG-5751WA GE black plate triple mica U getter like new 1958 (2.3/2.3ma and 2.4/2.3ma)
(!!!!!) (Best Pair) JG-5751WA GE gray plates triple mica U getter like new 1955 (2.3/2.1ma and 2.2/2.1ma)
(!!!!) (Recommended Pair) JRC-5751 RCA black plates test like new 1960's faded printing (2.8/2.7ma and 2.5/2.5ma) (high Gm)
(!!!) (Best Value Single) 6201=12AT7 GE Hewlett Packard NOS 1968 (8.2/9.6ma)
(!!) (Recommended Single) JG-5751 GE gray plates double mica "O" getter NOS 1965 (2.1/2.1ma)
(!) JG-6203 GE used/tests like new 1963 (52/40 and 53/40)
JG-6BH6 GE NOS 1961 (9.4ma)
