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

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

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

(1) Tested Sylvania 7A7 Tube Date Code 726 Sylvania 7A7 Tube Loctal Pentode Tube

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

(1) Tested RCA 6BH8 Tube with Box Date Code BZ 6BH8 Triode Pentode Tube

(1) Tested Philco 6AU8A Tube with Box Date Code 6504 Triode Pentode

(1) Tested GE 5X8 Tube with Box Date Code FV General Electric Triode Pentode