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6LF6 with Different Markings Marked “GT BRITIAN.” No “USA Stamp” “Made in USA.” Also stamped with “GT BRITIAN” “Made in USA.” 4 are RCA 2 are Syvania 1 is Zenith
6BA6/EF93 2 in RCA box 1 in GE box 1 made by Sonar
6AW8A 4 are RCA 3 are Sylvania