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(!!) (Single) GB-6SL7WGT Sylvania Gold Brand brown base round black plates "O" getter NOS 1950's (1.7/1.7ma) 1% section balance
(!!) (Single) JAN-5670W GE used/good 1970's (6.8/6.0ma)
(!!) (Single) JRC-12AU7 RCA NOS long gray plates mid-1950's "D" getter (9/11.6ma)
(!!) (slightly microphonic) 6SL7GT RCA NOS 1950 (2.2/2.3ma) 1-2% section balance
(!!) (slightly microphonic) 6SL7GT RCA NOS black plates gray coated glass 1952 (2.8/2.8ma) 1% section balance
(!!) (slightly microphonic) B309=12AT7 GEC UK black plates "D" getter NOS 1950's (9.6/10.8ma)
(!!) 12AT7 Brimar black plates NOS/70-75% 1955 (5.6/5.8ma)
(!!) 12AX7 GE branded Video black plates D getter 1957 used mis-matched triode sections (1.1ma/0.6ma)
(!!) 12BH7A Philco Sylvania gray oval plates "O" getter halo used/good 1962 (6.5/7.3ma)
(!!) 412A Western Electric NOS 1968 (52/40 and 53/40)
(!!) 412A Western Electric NOS 1969 (51/40 and 52/40)
(!!) 412A Western Electric NOS 1970 (53/40 and 53/40)
(!!) 5V4G RCA branded CBS black plates used/tests like new 1954 (62/40 and 62/40)
(!!) 5Z3G National Union burgundy base NOS "D" getter 1951 (56/40 and 59/40)
(!!) 6336 Chatham by Tungsol metal plates used 1950's 1st series made (54ma/85ma)
(!!) 6AN8A GE Great Britain NOS 1970 era (15/12ma)
(!!) 6AN8A Raytheon USA NOS 1960's (13.5/14.5ma)
(!!) 6SN7GTA Crosley Sylvania "chrome top" used/good 1954 (6.8ma/7.4ma)
(!!) 6SN7GTB Sylvania used/75% 1960's (6.0/6.4ma)
(!!) 7N7 Sylvania branded Philco used/good short bottle parallel gray plates 1948 (7.2/7.6ma)
