Tung-Sol U.S.A 5687WA Vacuum Tube Bronze Plate O Getter Copper Post Tested 100%+
(Since vacuum tubes were made 30 ?. This includes poor print, oxidized pins, faint discoloration, or poorly box. 6) Life Test = Useful Life in Tube =100%. Tube : NOS. Tube 1 ( 925/950 GM ) Minimum Value = 475.