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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 Pair) 10Y=VT-25 Sylvania NOS 1940's same build (29.4ma and 29.0ma)
(!!!!) (Best Overall Pair #1) 6J5GT Ken Rad black ribbed plates NOS 1942 (9.4ma and 9.4ma) 1% matched
(!!!!!) (Best Overall Pair) EF806S=EF86 Telefunken Germany <> bottom NOS 1965 (4.0mA and 3.9ma) (Same Gm) (Neumann U67, Shindo, Lawson)
(!!!!) (Best Pair #1) 6973 RCA NOS NOS 1969 (42ma and 42.8ma) (close Gm)