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

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

(1) Tested Strong RCA 17D4 Tube Code NG Half Wave Rectifier Tube

(1) Tested Strong Motorola 19AU4 Tube Date Code 5727 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 522 RCA 6W4 GT Half Wave Rectifier

(1) Tested Strong RCA 6DW4B Tube Date Code CL Half Wave Rectifier

(1) Tested RCA 6W4GT Tube with Box Date Code KG 6W4 GT Half Wave Rectifier Tube