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

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

$ 458.88
(!!!!) (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)

$ 444.88
(!!!!) (Best Single #3) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (114ma/143ma)

(!!!!) (Best Single #3) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (114ma/143ma)

$ 434.88
(!!!!) (Best Single #4) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (87ma/73ma)

(!!!!) (Best Single #4) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (87ma/73ma)

$ 408.88
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