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6AS7GA Sylvania branded RCA NOS 1983 (100ma and 125ma)
6AS7GA Sylvania metal base NOS 1960's (77/87ma)
6AU5GT Raytheon Japan gray plate NOS 1960's (single)
6AU5GT RCA black plates NOS 1950's (1 pair: 54ma and 53ma)
6AU5GT RCA gray plates NOS 1960 (57ma)
6AU5GT RCA gray plates NOS 1960 (66ma)
6AU5GT used/good
6AV5GA GE NOS 1957 (67ma)
6AV5GT Sylvania NOS (0 in stock)
6B4G Ken Rad branded RCA coated glass NOS 1946 (110ma)
6B4G Philco by Sylvania NOS 1947 (80ma)
6B4G Raytheon NOS 1950 era (94ma)
6B4G Sylvania branded RCA NOS 1940 era (100ma)
6B4G Sylvania rebranded Delco NOS separate plates 1952 (81ma)
6B4G Sylvania rebranded RCA used/good 1953 (77.5ma)
6B4G Zenith by Sylvania NOS plates connected 1940's (123ma)
6BD5GT US Brands NOS (5 in stock)
6BG6G Ken Rad tests like new 1951 (85ma)
6BG6G NJRT by Tungsol used/good 1955 (95ma)
6BG6G RCA NOS 1950's (66ma)
