(1) Tested GE 22BW3 Tube with Box Date Code JN General Electric Rectifier Tube

(1) Tested Strong Compactron 6DW4B Tube Half Wave Rectifier Tube

(1) Tested Strong Sylvania 6AF3 Tube with Original Box Half Wave Rectifier Tube

(1) Tested Sylvania 6AY3 Tube with Box Date Code mk RAF Half Wave Rectifier

(1) Tested Sylvania 6CL3 Tube with Box Date Code NR Half Wave Rectifier Tube

(1) Tested GE 35W4 Tube with Box Date Code 63-48 Red Letter Half Wave Rectifier

(1) Tested 1955 Tung-Sol 6W4GT Tube Date Code 528-3 6W4 GT Half Wave Rectifier

(1) Tested RCA 6DE4 Tube with Box Date Code AL RCA 6DE4 Half Wave Rectifier