407A Western Electric used/good 1972
$ 19.99
1 tube) 407A Western Electric used/good "O" getter halo (7252=1972) in white box (33/26 and 34/26)
(407A=396A with a 20V filament)
(407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament)
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