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(!!!!) (Best Overall Pair) 6146B Sylvania and Sylvania Amperex NOS 1970's same build (111ma and 116.5ma) (close Gm)
(!!!!) (Best Single #2) 6146B GE NOS 1981 (107ma)
(!!!!) (Best Single #3) 6146B GE NOS 1979 (98ma)
(!!!!) (Best Single) 6146B GE NOS 1980 (121ma)
(!!!!) (Best Value Pair) 6146B GE NOS 1974 and 1985 (86ma and 90.5ma)
(!!!) (Best Pair #1) 6146B RCA NOS 1968-1970's (96.5ma and 100ma)
(!!) (Best Pair #2) JAN-6146W Philips by Sylvania NOS 1986 (90ma and 92ma)
(!!) (Best Single) 6146B RCA branded GE NOS 1973 (102ma)
(!!) (Best Value Pair) 6146W Philips by Sylvania NOS 1986 (80ma and 80ma)
(!!) (Pair) 6146W GE JAN NOS 1987 (82ma and 84ma)
(!!) (Recommended Pair) JAN-6146W Sylvania NOS 1966 and 1976 (105ma and 98ma)
(!!) 6146B Sylvania branded RTC NOS 1960's (94ma)
6146 unknown maker NOS in CEI box tilted glass (116ma)
6146A GE NOS 1960's (82ma)
6146A GE NOS 1965 (69ma)
6146A RCA used/good 1971 (80ma)
6146B GE Amperex used/good 1979 (84ma)
6883A Sylvania NOS (0 in stock)
6883B Dumont by GE NOS 1975 (2 in stock)
CK-6146B Raytheon used/tests like new 1971 (116ma)