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(!!!) (PAIR) 6HF5 Sylvania NOS 1970's (83ma and 85ma)
(!!!) (PAIR) 6HF5 Sylvania NOS 1970's (96ma and 97ma)
(!) (BEST SINGLE) 6HF5 Sylvania NOS 1970 era (117.5ma)
6HF5 RCA NOS 1968 (101ma)
6HF5 RCA NOS 1972 (123ma)
6HF5 RCA NOS 1972 (90ma)
6HF5 Sylvania NOS 1970 era some small mica flakes inside tube (96ma)
