(1) Tested Silvertone 6BC5 Tube Date Code 312 Sharp Cutoff Pentode Tube

(1) Tested Philco 6BC5 Tube Date Code 5311 Sharp Cutoff Pentode Tube

(1) Tested National Union 6BC5 Tube Date Code 533 Sharp Cutoff Pentode Tube

(1) Tested RCA 3CE5 Tube with Box Date Code MI Sharp Cutoff Pentode Tube (b)

(1) Tested RCA 3CE5 Tube with Box Date Code MI Sharp Cutoff Pentode Tube (a)

(1) Tested RCA 3CE5 Tube with Box Date Code MG Sharp Cutoff Pentode Tube (a)

(1) Tested Strong Philco 6BC5 Tube Date Code 61-47 Sharp Cutoff Pentode Tube

(1) Tested Sylvania 6GH8A Tube with Box Date Code ae Triode Sharp Cutoff Pentode