(!!!!) (Best 6922 Siemens Single) 6922=E88CC Siemens Halske Germany gray shield NOS 1963 (A0 Series=1st series) rebranded RCA (14.0/14.2ma) 1% section balance (mic grade)
(!!!!) (~ Recommended Siemens Pair ~) E88CC=6922 Siemens Germany "A" Frame NOS 1974 1-2% matched (13.5/14.8ma and 13.4/14.0ma)
(!!!!) (~ Recommended Siemens Pair ~) E88CC=6922 Siemens Germany "A" Frame NOS 1974 1-3% matched (14.4/16.2ma and 14.2/15.6ma)
(!!!!) (~ Recommended Siemens Pair ~) E88CC=6922 Siemens Halske Germany low hours/test like new "O" getter halo 1968-1969 (A4 Series) (14.0/16.0ma and 15.1/16.0ma) (closely matched)
(!!!!) (~ Recommended Siemens Pair ~) E88CC=6922 Siemens Halske Germany NOS "O" getter halo 1969-1970 faded printing (A4 Series) (16.6/17.2ma and 16.8/18.4ma) (closely matched) (good value)
(!!!!) (~ Recommended Siemens Pair ~) E88CC=6922 Siemens Halske Germany NOS "O" getter halo 1970 (A4 Series) (13.0/13.8ma and 14.0/14.0ma) (closely matched)
(!!!) (Best Pair) ECC85=6AQ8 RCA Siemens Halske Germany NOS 1969 (13.8/14ma and 14.2/14.2ma)
(!!!) (Best Pair) ECC85=6AQ8 RCA Siemens Halske Germany NOS 1969 1-2% matched
(!!!) (Recommended Pair) ECC85=6AQ8 RCA Siemens Halske Germany NOS 1969
(!!!) E88CC=Siemens Halske Germany gray shield NOS 1959-1960 era with serial number code along bottom edge (10.6/15.8ma)
CCa Valvo Holland used/65% 1961 in white box (11/12ma)
