(!!!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (53/40 and 53/40)
(!!!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (56/40 and 60/40)
(!!!!) (Best Overall 6X4W) 6X4W Tungsol NOS 1950's curved "D" getter halo (58/40 and 60/40)
(!!!!) (Best PAIR) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (55/40 and 56/40 x 2 tubes)
(!!!!) (Best Value) JTL-6X4 Tungsol 1950's curved "D" getter low hours/like new reprinted in 1977 (58/40 and 60/40)
(!!!!) (Best Value) JTL-6X4 Tungsol 1950's curved "D" getter low hours/like new reprinted in 1977 (60/40 and 60/40)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (52-55/40 and 53-55/40 x 2 tubes)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (53-54/40 x 2 tubes)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched (54-55/40 and 54-55/40 x 2 tubes)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched (54-56/40 and 54-56/40 x 2 tubes)
(!!!) (BEST PRICE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (3 in stock)
(!!!) (BEST SYLVANIA PAIR) JHS-6X4WA Sylvania NOS 1966 (54-55/40 and 55-55/40) 1-2% matched
(!!!) (BEST SYLVANIA PAIR) JHS-6X4WA Sylvania NOS 1968-1971 (54-55/40 and 55-55/40) 1-2% matched
(!!!) (BEST VALUE SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's slightly tilted glass (54/40 and 54/40)
(!!!) (Best Value) JAN-6X4WA Sylvania NOS 1972-1979 (1 in stock)
(!!!) (Recommended PAIR) JHS-6X4WA Sylvania NOS 1965-1966 (53-53/40 and 53-54/40)
(!!!) (Recommended RCA Pair) 6X4 RCA NOS 1960's (51-52/40 and 51-53/40 x 2 tubes)
(!!!) (Recommended Single from 1955) JTL-6X4W Tungsol NOS 1955 curved "D" getter halo (1 in stock) (best sound)
(!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (53/40 and 54/40)
(!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (54/40 and 55/40)
