(!!!!) (Recommended Single) EC92 Valvo Germany by Siemens NOS 1972 (12.5ma)
(!!!) (Best Single) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10ma)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!) (Single) EC92=6AB4 Siemens Halske Germany branded Philips Miniwatt NOS 1965 (9ma)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!) EC92 Siemens Halske NOS rebranded Philips Import 1969 "O" getter halo (9.2ma)
(!!) EC92 Siemens Halske NOS rebranded Philips Miniwatt 1968 "O" getter halo (6.8ma)
6664=6AB4 RCA black plate NOS 1967 (9ma)
6AB4 GE branded CBS NOS 1960 era (13ma)
6AB4 GE NOS "D" getter 1962 (8ma)
6AB4 RCA black plate "D" getter NOS 1950's (11.4ma)
6AB4 RCA black plate "D" getter NOS 1955 (11.8ma)
6AB4 RCA branded CBS "D" getter halo black plate 1960 (12.9mA)
6AB4 RCA branded Sylvania NOS 1970 (10ma)
6AB4 Tungsol NOS "D" getter 1950's (13.2ma)
6AB4 Tungsol NOS "D" getter 1950's (9.6ma)
