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(!!!!) (Best Overall Pair) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 same date codes (9.2/9.5ma) (mic)
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!!) (Best Single #1) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 (15ma) (mic)
(!!!!) (Best Single #1) EC92=6AB4 Telefunken Germany <> bottom NOS 1968 (10.6ma) (mic)
(!!!!) (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 Value Pair) EC92=6AB4 Telefunken Germany <> bottom NOS 1964-1965 (7.3ma and 7.0ma) (same Gm) (mic)
(!!!!) (Recommended Single) EC92 Valvo Germany by Siemens NOS 1972 (12.5ma)
(!!!) (Best Pair #2) EC92=6AB4 Telefunken Germany <> bottom NOS 1965-1969 (7.5/7.8ma) (mic)
(!!!) (Best Pair) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10.2ma and 10.6ma)
(!!!) (Best Single) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10ma) (mic)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!) (Single) EC92=6AB4 Siemens Halske Germany branded Mullard 1964 (8.4ma) (mic)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!) EC92 Siemens Halske NOS rebranded Philips Miniwatt 1968 "O" getter halo (6.8ma)
6AB4 RCA branded CBS "D" getter halo black plate 1960 (12.9mA)
6AB4 Tungsol NOS "D" getter 1950's (13.2ma)
6AB4 Tungsol NOS "D" getter 1950's (9.6ma)
