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

(1) Tested GE 6JD6 Tube with Box Date Code FK General Electric Pentode Tube

(1) Tested GE 6CU8 Tube with Box Code EZ General Electric Triode Pentode (a)

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

(1) Tested GE 6JD6 Tube with Box Date Code JR General Electric Pentode Tube

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

(1) Tested GE 6JD6 Tube and Box Date Code HH General Electric Pentode Tube

(1) Tested Sylvania 6GH8A Tube with Box Date Code ae Triode Sharp Cutoff Pentode