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(!!!!) (Best Value Single) JAN-6922 Amperex USA like new 1971 (13.4/12.6ma)
(!!!!) (Single) E88CC=6922 Mullard Holland SQ used/good 1965 (10.2/9.5ma) (3D MIDS) (Good Gm)
(!) E88CC=6922 Valvo Holland used/good 1961 (10.2/10.1ma) 1-3% section balance
E88CC=6922 Siemens Halske Germany "gray shield" Gold Pins used/good 1963 (10.6/12.2ma)
(!!!!) (Best Single) E88CC=6922 Telefunken Germany <> bottom NOS 1962 (16.4/17.5ma) (mic grade)
(!!!!!) (Best Siemens Pair) 6922=E88CC Siemens Halske Germany branded "ECC88 Industria" gray shield NOS 1965 (19.2/20.4ma and 19.0/19.2ma) (mic, phono preamp)
(!!!) (slightly microphonic) 6922=E88CC Tesla Czech Republic NOS 1970 (22/21ma)
(!!!!) (Best Value Single) 6922=E88CC Penta Labs Hungary used/like new 1980 era (13.8/15.8ma)
(!!!!) (2nd Best Amperex PQ Single) 6922 Amperex PQ USA NOS 1962 (14.5/16.2ma) (Audio Research, Nova)
(!!!!) (Single) GB-6922 Sylvania Gold Brand Gold Pins used/75% 1960's (8.0/8.4ma)
(!!!) (Best Value Pair) JAN-6922 Sylvania NOS 1971-1979 (17.6/18.3ma and 15.0/18.4ma) (smooth presentation)
(!!) (slightly microphonic) 6922=E88CC Tesla Czech Republic NOS 1970 (18.6/20.4ma) (RODE)
(!!) (Single) E88CC=6922 Philips SQ Holland gold pins used/good 1973 (10/9ma) (Good Gm)
(READ REVIEW) E88CC=6922 Siemens Halske Germany NOS 1962 (16.0/15.5ma) (mic grade)
(!!!!!) (Best Siemens Pair #2) 6922=E88CC Siemens Halske Germany branded "ECC88 Industria" gray shield NOS 1965 (16.6/17.0ma and 19.8/16.0ma) (mic, phono preamp)
