(!!) 6AN8A Sylvania coated glass NOS 1960's (20.2/11.2ma)
(!!) 6K6GT Channel Master Japan 1960's (50ma)
(!!) 6K6GT Sylvania NOS 1970 era (42.5ma)
(!!) 6SN7GTA Sylvania "chrome top" tall bottle used/good 1950 era (6ma/6ma) 1-2% section balance
(!) (BEST GZ32 SINGLE) GZ32 Miniwatt Dario France NOS 1956 (62/40 and 62/40) small rattle inside base
(!) (BEST GZ32 SINGLE) GZ32 Miniwatt Dario France NOS 1956 (63/40 and 63/40) small rattle inside base
(!) (BEST GZ32 SINGLE) GZ32 Miniwatt Dario France NOS 1956 (64/40 and 64/40) small rattle inside base
(!) (BEST GZ32 SINGLE) GZ32 Miniwatt Dario France NOS around 1955 (61/40 and 62/40) very small rattle inside base
(!) 6L6Y RCA metal can (Y=brown bottom) NOS 1955 (78.8ma)
(Recommended Single) 5U4GA GE "D" getter NOS 1955 slightly tilted glass (58/40 and 59/50)
(slightly microphonic tube) 12AT7 Brimar UK black plates "D" getter halo copper grid posts used/good 1955 era (7.2/8.4ma)
(slightly microphonic) 12BH7 GE Zenith NOS "U" getter 1953 (10.0/10.6ma)
12AZ7 GE black plates "D" getter halo NOS 1955 (11ma/7.5ma)
12SN7GT CBS NOS 1950's (9.0/9.6ma)
12X4 RCA Motorola black plates "D" getter NOS 1960 era (48/40 and 49/40)
407A LM Ericsson Sweden like new 1960's (41/26 and 42/26)
407A LM Ericsson Sweden used/good 1960's
407A Western Electric used/good 1959 (32/26 and 34/26)
407A Western Electric used/good 1962 (35/26 and 42/26)
6CG7 Sylvania gray plates NOS "U" getter 1958 with chrome electrostatic shield between plates (6.8ma/8.8ma)
