(!!!!!) (Best Value Pair) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (2.9/3.1ma and 3.1/2.9ma) 1-2% matched (Audio Note, Kondo, mics)
(!!!!!) (Best Value Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new faded printing (2.9/3.2ma) (mic, preamp, amp)
(!!!!!) (Recommended Pair) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (3.0/2.7ma and 3.0/2.8ma) 1-2% matched (Audio Note, Kondo, Korby, Lawson)
(!!!!!) (Recommended Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (2.7/3.0ma) (V1 guitar amp, mics, Audio Note)
(!!!!!) (Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new faded printing (2.6/3.1ma) (mic grade)
(!!!!) (2nd Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.6/2.7ma and 2.7/2.8ma) 1-3% matched (Same Gm)
(!!!!) (Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.8/2.9ma and 2.8/2.9ma) 1% matched
(!!!!) (Best Value Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/good (2.0/2.1ma)
(!!!!) (Recommended Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.4/2.8ma and 2.5/2.6ma) 1-3% matched (same Gm)
(!!!) (BEST VALUE) 6072A GE black plates double mica NOS 1980 (2.4/2.7ma)
(!!) (Best Value Single) EF14 Telefunken Germany used/good 1950 (12.5ma)
(!!) (Slightly Microphoinic Single) 6072A RCA black plates NOS 1971 (2.6/3.0ma)
(!!) EF80=6BX6 Mullard UK "D" getter NOS 1963 faded Mullard logo (10.6ma)
(!!) EF80=6BX6 RTC by EI Yugoslavia NOS 1976 (14ma)
EF80 Lorenz made in Philips Italy NOS 1967 (7ma)
EF80 Siemens Germany 1964 rebranded IEC Mullard 1966 NOS (6.7ma)
EF80 Valvo made in Philips Italy NOS 1969 (8.5ma)
EF80=6BX6 Sylvania Made in England unknown maker NOS 1970's (19.5ma)
GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (read review)