(1) Tested RCA Radiotron Cunningham Type 55 Tube Code L12 Engraved Base

(1) Tested Sylvania Type 27 Tube Date Code A5R Engraved Base 27 Tube Triode

(1) Tested National Union Type 35 Tube Engraved Base Date Code J Tetrode Tube

(1) Tested RCA Cunningham Type 34 Tube Date Code Z4 Engraved Base Foil D Getter

(1) Tested RCA Cunningham Type 41 Tube Engraved Base Date Code J12 Power Pentode

(1) Tested Tung-Sol Type 24 Tube Engraved Base Date Code 7-3 Tetrode Tube

(1) Tested Coronado Type 27 Tube with Engraved Base Date Code Y 27 Tube Triode

(1) Tested Philco Type 41 Tube Date Code 7U Engraved Base Power Pentode Tube