(1) Tested RCA 3BC5 3CE5 Tube with Box Date Code BN Sharp Cutoff Pentode Tube

(1) Tested RCA 3DT6A Tube with Box Date Code BM 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 RCA 6AG5 Tube Date Code LS RCA Sharp Cutoff Pentode Tube

(1) Tested RCA 6HS8 Tube with Box Date Code BV Sharp Cutoff Twin Pentode Tube

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