(!!!!) (Recommended Pair) 417A Western Electric NOS "D" getter 1958 and 1961 (22ma and 22ma)

1 pair) 417A Western Electric NOS "D" getter 1958-1961

1 tube) 22ma Gm=21,000 (1961)

1 tube) 22ma Gm=24,500 (1961)

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