(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 (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 with Box Date Code CJ Sharp Cutoff Pentode Tube

(1) Tested Strong RCA 6GY6 Tube with Box Date Code DD Sharp Cutoff Pentode Tube

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

(1) Tested RCA 6DT6A Tube Date Code CK RCA 6DT6 A Sharp Cut Off Pentode Tube