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(!!!!!) (Best Value Pair) 45 RCA/Cunningham engraved base used/75% (22.4ma and 23.8ma) (Close Gm) (Excellent sonics in SET amp)
(!!!!!) (Best Value Pair) 45 Tungsol used/very good similar build different top mica 1930's - 1940's (27ma and 25ma) (sound great - one of my favorites)
(!!!!!) (Best Value Single) 45 Sylvania green leaf NOS 1940's production stains on glass (37.2ma) (Highest mA and Gm)
(!!!!!) (Good Value Single) 45 Sylvania branded RCA NOS 1952 production stains on glass (31.6ma)
(!!!) (Best Value Single) 45 Tungsol tests like new 1940's (40ma)
