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(!!!) (Best Pair #2) EC92=6AB4 Telefunken Germany <> bottom NOS 1965-1969 (7.5/7.8ma) (mic)
(!!) EC92 Siemens Halske NOS rebranded Philips Miniwatt 1968 "O" getter halo (6.8ma)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!!) (Recommended Single) EC92 Valvo Germany by Siemens NOS 1972 (12.5ma)
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!) (Best Pair) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10.2ma and 10.6ma)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
6AB4 RCA branded Sylvania NOS 1970 (10ma)
6AB4 RCA black plate NOS 1966 (11.5ma)
6AB4 Tungsol NOS "D" getter 1950's (13.2ma)
6AB4 RCA branded CBS "D" getter halo black plate 1960 (12.9mA)
6AB4 GE branded CBS NOS 1960 era (13ma)
6AB4 GE NOS "D" getter 1962 (8ma)
6AB4 Tungsol NOS "D" getter 1950's (9.6ma)
(!!!!) (Best Single #3) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 (8.2ma) (mic)
(!!!!) (Best Single #4) EC92=6AB4 Telefunken Germany <> bottom NOS 1969 (8ma) (mic)
(!!!) (Best Single) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10ma) (mic)
(!!!) (Single) EC92=6AB4 Siemens Halske Germany branded Mullard 1964 (8.4ma) (mic)
6AB4 RCA black plate "D" getter NOS 1950's (11.4ma)
(!!!!) (Best Value Pair) EC92=6AB4 Telefunken Germany <> bottom NOS 1964-1965 (7.3ma and 7.0ma) (same Gm) (mic)
