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6CS7 RCA NOS 1970's (23.6ma and 13.5ma)
6CS7 Sylvania branded RCA used/good "U" getter halo 1950's (18/8.2ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6CU5 NOS (10 in stock)
6CU6 Sylvania black plate like new condition (54ma)
6CU6 Sylvania black plate NOS (55ma)
6CU6 Sylvania black plate NOS (72ma)
6CU6 Sylvania gray plate NOS (58ma)
6CU6 Sylvania gray plate NOS (87ma)
6CU8 US Brands (15 in stock)
6CW4 GE like new 1980 (120/60)
6CW4 RCA NOS 1970 era (1 in stock)
6CW4 Tungsol NOS (1 in stock)
6CW4 used/good (5 in stock)
6CX8 US Brands NOS (14 in stock)
6CX8 US Brands NOS (2 for $5)
6CY5 NOS (40 in stock)
6CY7 (sold out)
6CZ5 GE Canada black plate NOS 1969 (49ma) (Same build as RCA)
6CZ5 GE Europe gray plate NOS 1975 (60ma)
