(1) Tested Sylvania 6JC8 Tube with Box Date Code NR EDF Triode Pentode Tube

(1) Tested Strong Sylvania 6JC8 Tube Date Code NR JAG Triode Pentode Tube

(1) Tested Very Strong GE 6JC8 Tube with Box Date Code CV Triode Pentode Tube

(1) Tested Sylvania 12JN8 Tube with Box Date Code NR AAA Triode Pentode Tube (b)

(1) Tested GE 6JC8 Tube with Box Date Code SC General Electric Triode Pentode

(1) Tested Sylvania 6JT8 Tube with Box Date Code bk Sylvania 6JT8 Triode Pentode

(1) Tested RCA 6EH8 Tube with Box Date Code CQ Triode Pentode Vacuum Tube

(1) Tested GE 6JV8 Tube with Box Date Code FI General Electric Triode Pentode