Offered is the Zenith type 80 Full-Wave Rectifier Tube. The tube is clean and in good condition. It is an early type with Hot-Stamped base graphics.  The tube tests good on the EICO dynamic tester and it shows no shorts or inter-element leakage.  Production code: HK3. The tube has smooth black plates and a lower getter with excellent silver flashing.  This tube has hanging type filaments. There are a few loose particles within the base-the base is firmly attached. Early 1930's vintage.  Pick up the OEM tube for your own Zenith radio restoration.  NO RESERVE!! Thanks for looking.