(1) Tested RCA 12SJ7 Tube with Box Date Code MC RCA Sharp Pentode Tube

(1) Tested RCA 12SJ7 Tube with Box Date Code 426 RCA Sharp Pentode Tube

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

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

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

(1) Tested RCA 6GY6 Tube Date Code 65-48 6GY6 Sharp Cutoff Pentode Tube

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

(1) Tested RCA 6BH6 Tube with Box Date Code CJ Sharp Cutoff Pentode Tube