(!!!!!) (BEST SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (55/40 and 55/40) 1% diode balance
(!!!!!) (Good Value Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (55/40 and 56/40) 1-2% balance
(!!!!) (Best Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched (54-54/40 and 54-55/40)
(!!!!) (Good Value Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched - slightly faded top getters (54-55/40 x 2 tubes)
(!!!) (BEST PAIR) GB-6X4WA Sylvania Gold Brand NOS "D" getter 1960 era (56/40 and 58/40 x 2 tubes)
(!!!) (Best Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (57/40 and 58/40)
(!!!) (BEST VALUE SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's slightly tilted glass (52/40 and 54/40)
(!!!) (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 Single) JTL-6X4W Tungsol NOS 1955 curved "D" getter (49/40 and 52/40)
(!!!) (Recommended Single) JTL-6X4WA Tungsol NOS 1961 curved "D" getter (51/40 and 52/40)
(!!!) (Set of 74) 6X4 US Brands NOS original boxes 1950-1980 era (set of 74)
(!!!) (Single) 6X4 Tungsol NOS 1960's (60/40 and 66/40)
(!!!) (Single) GB-6X4WA Sylvania Gold Brand NOS "D" getter 1960 era (57/40 and 57/40)
(!!!) FAA-6X4WA Sylvania NOS 1965 (55/40 and 57/40)
(!!) (2nd BEST SYLVANIA PAIR) 6X4 Sylvania Philco NOS 1959 "D" getter (53-55/40 and 55-56/40)
(!!) (6202 Best Value) 6202 GE rebranded 6X4WA GE JAN NOS 1981 (61/40 and 64/40)
(!!) (BEST SYLVANIA PAIR) 6X4 Sylvania Philco NOS 1959 "D" getter (52-54/40 and 53-54/40)
(!) 6X4 Philco by Sylvania NOS 1961 (51/40 and 52/40)
(!) JAN-6X4WA Sylvania used/good 1967 (48/40 and 50/40)
