(!!) (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)
(!!) (Best 6146A Single) 6146A Sylvania NOS 1970 era (100ma)
(!!) (Best Pair) 6J6A Tungsol NOS "D" getter 1961 (9.4/10.5ma and 9.0/11.4ma)
(!!) (Best Single 1967) 6550 Tungsol branded Hewlett Packard NOS 1967 (146.5ma)
(!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (9.8/9.6ma)
(!!) (Best Single) 5687 Tungsol rebranded CBS black plates "U" getter NOS 1950's (38/48ma)
(!!) (Best Single) 6AU6A Tungsol NOS 1960 (9.4ma)
(!!) (Best Single) UY-227 RCA Radiotron Balloon tests like new 1930 era (10.2ma)
(!!) (BEST VALUE) JAN-CHS-1629 Sylvania NOS 1943 bright eye (7 in stock)
(!!) (Bright Eyes) 1629 RCA NOS 1957
(!!) (Good Value Pair) 6384 Tungsol used/good 1967-1969 same build, 1 tube has slightly tilted glass (59.5ma and 60ma)
(!!) (Good Value Single) 12AZ7 Tungsol black plates "U" getter halo NOS 1950's (7.5ma/7.5ma)
(!!) (Good Value Single) 5687 Tungsol black plates "U" getter halo used/very good 1957 (30/33ma)
(!!) (Recommended Pair) 6AW8A GE NOS 1976 (3.1/3.3ma and 22/23ma) (Shindo)
(!!) (Recommended Pair) 6AW8A Sylvania NOS 1960's (3.8/3.3ma and 19/21.5ma)
(!!) (Recommended Pair) 6J6A Tungsol NOS "D" getter 1961 (7.5/8.8ma and 7.8/9.2ma)
(!!) (Recommended Pair) 6S4A Westinghouse black plate NOS -1963 era (20ma and 21.2ma)
(!!) (Recommended Single) 12AY7 GE NOS "O" getter NOS 1964 (2.2/2.7ma)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (73ma) (same build as Tungsol)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (81ma) (same build as Tungsol)