(!!) 6SN7GTB Sylvania used/75% 1960's (6.0/6.4ma)
(!!!!) (Good Value Pair) 8SN7GTB Sylvania GM Delco "chrome top" NOS 1957 same build (6.4/7.2ma and 7.4/6.2ma) (Schiit Freya, Rogue, Modwright OPPO, Cary) (1-5% matched)
(!!!) (Best Value Pair) 6SN7GTB RCA coin-base black plates 1970-1975 (8/10ma and 9.8/8ma)
(!!) 6SN7GTA Sylvania "chrome top" tall bottle used/good 1950 era (6ma/6ma) 1-2% section balance
(!!!!) (Good Value Pair) 6SN7GTB Sylvania chrome top like new 1950's (8.0/9.1ma and 8.0/9.2ma) (Schiit Freya, Rogue, Modwright OPPO)
(!!!) (Recommended Single) 6SN7GTB Sylvania NOS 1960's (7.2ma and 6.6ma)
(!) (SINGLE) JAN-CLRV-6SN7WGTA GE Canada brown base NOS 1970 (7.8/6.4ma)
