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(!!!!) (BEST PAIR) 6201=12AT7WC GE "5 STAR" NOS double mica, copper grid posts, gray plates, 1972 (10.8/12ma and 11.2/11.0ma)
(!!!!) (BEST PAIR #2) 6201=12AT7WC GE "5 STAR" NOS double mica, copper grid posts, gray plates, 1972 (7.2/8.6ma and 8.6/8.2ma)