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(!!!!) (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 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)
(!!!) (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)
(!!) 6X4 RCA NOS 1969 (50/40 and 51/40)
(READ REVIEW) JRP-6X4W Raytheon "D" getter low hours/like new 1952 (66/40 and 68/40)
6X4 Arcturus by GE NOS "D" getter 1960 (54/40 and 54/40)
6X4 GE Beckman like new "D" getter 1962 (54/40 and 52/40)
6X4 GE Hewlett Packard NOS "D" getter halo 1962 (55/40 and 56/40)
6X4 GE like new 1950's "D" getter (54/40 and 54/40)
6X4 RCA "O" getter used/good 1960's (44/40 and 49/40)
6X4W GE used/tests like new 1960 era "D" getter (52/40 and 52/40)
6X4WA GE black plates rebranded National NOS (55/40 and 56/40)
6X4WA GE used/tests like new 1960 era no printing (54/40 and 54/40)
