(1) Tested Strong RCA 6JH6 Tube with Box Date Code CA RCA Pentode Tube

(1) Tested Strong RCA 8GN8 Tube with Box Date Code AV Triode Pentode Tube

(1) Tested RCA 6CU5 with Box Date Code NF Black Plate Beam Power Pentode Tube

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

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

(1) Tested RCA 6CU5 with Box Date Code CV Black Plate Beam Power Pentode Tube

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

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