(1) Tested Very Strong RCA 6GY6 Tube Date Code CT 6GY6 Sharp Cutoff Pentode Tube

(1) Tested Magnavox 6GY6 Tube Date Code 63-26 6GY6 Sharp Cutoff Pentode Tube

(1) Tested RCA 3BC5 Tube with Box Date Code KQ 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 6GY6 Tube Date Code 65-48 6GY6 Sharp Cutoff Pentode Tube

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