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(!!!!) (Best Overall) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (113ma/119ma) (close triode section balance)

(!!!!) (Best Overall) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (113ma/119ma) (close triode section balance)

$ 444.44
(!!!!) (Best Pair #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (84ma/104ma and 91ma/95ma) (close Gm balance)

(!!!!) (Best Pair #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (84ma/104ma and 91ma/95ma) (close Gm balance)

$ 864.44
(!!!!) (Best Pair) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/91ma and 92ma/103ma) (close Gm balance)

(!!!!) (Best Pair) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/91ma and 92ma/103ma) (close Gm balance)

$ 874.44
(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (117ma/141ma) (close Gm balance)

(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (117ma/141ma) (close Gm balance)

$ 434.44
(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/100ma) (close triode section balance)

(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/100ma) (close triode section balance)

$ 434.44
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