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

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

(1) Tested RCA 3BC5 Tube with Box Date Code KQ Sharp Cutoff Pentode Tube

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

(1) Tested RCA 6CY5 Tube with Box Date Code BF Sharp Cutoff Tetrode Tube

(1) Tested RCA 6AC7 Tube Date Code 352 RCA 6AC7 Sharp Cutoff Pentode Tube