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

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

(1) Tested GE 6HS8 Tube with Box Date Code FE Sharp Cutoff Twin Pentode Tube

(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 Zenith 6HS8 Tube Date Code 642 Sharp Cutoff Twin Pentode Tube