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(!!) 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)
(!!) ECC31=CV1285=6N7G Mullard black plates NOS 1950's (7.4/9.4ma)
(!!) JAN-CRC-5V4G RCA black plates used/tests like new 1958 (62/40 and 62/40)
(!!) JAN-CRP-5687WA Raytheon black plates "O" getter halo 1962 used/tests like new (44.5/39ma)
(!!) JTL-5687WA Tungsol bronze plates "O" getter used/good 1958 (30/30.5ma)
(!) (BEST PRICE) 0B2 RCA used/good 1960's - 1970's (4 tubes for $9.99)
(!) (Best Single) 5Z3G RCA FAA NOS 1962 (56/40 and 55/40)
(!) (Best Single) 7N7 Sylvania NOS 1960 era (10.8/11.2ma)
(!) (Best SIngle) EF95=6AK5 Raytheon Toshiba Japan NOS 1960's (8.6ma)
(!) (Best Value used) 5998 Tungsol branded IBM black plates used/good 1961 very small rattle inside base (68ma/67ma)
