(1) Tested Very Strong RCA 1J3 Tube Date Code MP Half Wave Rectifier Tube

(1) Tested Philco 17D4 Tube Code 5839 Sylvania EIA Code Half Wave Rectifier Tube

(1) Tested Strong Motorola 19AU4 Tube Date Code 5727 Half Wave Rectifier

(1) Tested Zenith 3A3A Tube Date Code 68-17 Zenith 3A3 A Half Wave Rectifier

(1) Tested RCA 6W4GT Tube Date Code 0-43 RCA 6W4 GT Half Wave Rectifier

(1) Tested RCA 6W4GT Tube Date Code 3-43 RCA 6W4 GT Half Wave Rectifier

(1) Tested Strong Motorola 19AU4 Tube Date Code 57-17 Half Wave Rectifier Tube

(1) Tested Very Strong RCA 6AF3 Tube with Box Date Code ND Half Wave Rectifier