(1) Tested GE 6JV8 Tube and Box Date Code NJ General Electric Triode Pentode (a)

(1) Tested Sylvania 6JV8 Tube with Box Date Code NR AAA Triode Pentode Tube

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

(1) Tested GE 6JV8 Tube and Box Date Code NJ General Electric Triode Pentode (b)

(1) Tested RCA 6JV8 Tube and Box Date Code BZ Triode Pentode Tube (b)

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

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

(1) Tested GE 5GH8 Tube with Box Date Code JC General Electric Triode Pentode