(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 Strong Philco 6BC5 Tube Date Code 61-47 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 Sylvania 6EW6 Tube Date Code 548 Sharp Cutoff Pentode Tube

(1) Tested Westinghouse 6AU6 Tube Date Code 5R30 Sharp Cut Off Pentode Tube

(1) Tested RCA 6BH6 Tube Date Code BP RCA Sharp Cutoff Pentode Tube