(!!!!) (BEST PRICE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (54/40 and 55/40)
(!!!!) (Recommended Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched (53-55/40 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)
(!!!) (BEST VALUE SINGLE) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's slightly tilted glass (54/40 and 54/40)
(!!!) (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)
(!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (54/40 and 56/40)
(!!!) (Recommended Single) 6X4W Tungsol NOS 1966 (50/40 and 50/40)
(!!!) (Recommended Single) JTL-6X4W Tungsol NOS 1955 curved "D" getter (49/40 and 52/40)
(!!!) (Set of 77) 6X4 US Brands NOS original boxes 1950-1980 era (set fo 77)
(!!!) (Single) 6X4 Tungsol NOS 1960's (60/40 and 66/40)
(!) (SINGLE) 417A/5842 LM Ericsson Sweden NOS "O" getter halo 1960's (35ma and Gm=29,700)
(!) 417A/5842 LM Ericsson Sweden used/good "O" getter halo 1960's (19ma and Gm=23,900)
407A LM Ericsson Sweden like new 1960's (41/26 and 42/26)
407A LM Ericsson Sweden used/good 1960's
6X4 Arcturus by GE NOS "D" getter 1960 (54/40 and 54/40)
6X4 National Union "D" getter halo tests like new 1955 (56/40 and 58/40)
6X4 RCA "O" getter low hours/like new 1960's (49/40 and 52/40)
6X4WA GE black plates rebranded National NOS (55/40 and 56/40)
