(!!!) (#2 19J6 Pair) 9J6 RCA NOS 1950's - 1960's same internal plate structure, different getter halo shape

1 matched pair) 19J6 RCA NOS 1950's - 1960's same internal plate structure, different getter halo shape

1 tube) 38-43/27 "U" getter halo RCA rebranded GE 1950's

1 tube) 37-45/27 "O" getter halo RCA

Millett Starving Student Hybrid

(all made by RCA and can be rebranded various names like Sylvania, Ken Rad, etc.)