(1) Tested RCA 6AG5 Tube with Box Date Code KH RCA Sharp Cutoff Pentode Tube

(1) Tested Sylvania 6AG5 Tube and Box Code jc BOD Sharp Cutoff Pentode Tube (b)

(1) Tested RCA 3DT6A Tube with Box Date Code BM Sharp Cutoff Pentode Tube

(1) Tested RCA 6AU6 Tube Code GR Sharp Cut Off Pentode Vintage 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 RCA 6BH6 Tube Date Code BP RCA Sharp Cutoff Pentode Tube