(!!!) (Recommended Pair) 6KD6 GE NOS 1970's same build (92ma and 91ma)
(!!!) 6KD6 Sylvania double plates NOS 1960's (98ma)
(!!) (Best Value Pair) 6KD6 GE NOS and used/like new 1967 and 1984 (88ma and 92ma)
(!!) (Good Value Pair) 6KD6 GE branded Westinghouse NOS 1982 (60ma and 61ma)
(!!) (Good Value Pair) 6KD6 GE branded Westinghouse NOS 1982 (62ma and 65ma)
(!!) (Recommended Pair) 6KD6 Sylvania NOS and low hours/like new (82ma and 83ma)
6KD6 GE branded Dumont NOS (83ma)
6KD6 GE NOS (83ma)
6KD6 Sylvania branded RCA NOS 1970's (87ma)
6KD6 Sylvania NOS (102ma)
6KD6 Sylvania NOS (112ma) (Yaesu)