HERE IS A VINTAGE CUNNINGHAM ELECTRON / RADIOTRON VACUUM TUBE # 84 6Z4 BY RCA. TUBE IS IN ORIGINAL PACKAGING WITH A BOX TAB DATE OF (5-44). HAS TUBE NUMBER "84 6Z4" IN GLASS GLOBE AND SILVER "CUNNINGHAM MADE IN USA" ON BLACK BOTTOM BASE SIDE WITH "626" IN SILVER ALSO. GUARANTEED NEW AND NEVER USED, NEVER TESTED OUTSIDE OF PRODUCTION PLANT. PLEASE KNOW I HAVE SOLD SEVERAL TUBES NOS FROM MY DECEASED FATHER IN-LAWS OLD TV AND AUDIO REPAIR STOCK INVENTORY AND EVERYONE HAS BEEN PLEASED AND STATED MY TUBES HAVE TESTED STRONG. PLEASE REFER TO PAST FEEDBACKS IF YOU LIKE. ORIGINAL BOX HAS SOME MINOR SIGNS OF SHELF AND STORAGE WEAR. PLEASE READ FULL ITEM CONDITION AND VIEW ALL PICS.