6201=12AT7 GE “”5 STAR”” used/good triple mica “”U”” getter halo, copper grid posts, gray plates, 1957 (6.2/7.8ma)

1 low noise tube) 6201 GE “”5 STAR”” used/good triple mica “”U”” getter halo, copper grid posts, gray plates, 1957

6.2ma Gm=4000

7.8ma Gm=4400