Offered are (3) 50B5 Audio Output Tubes Zenith branded, made by Sylvania. The tubes are clean and in good condition. They each test good on the EICO dynamic tester and they show no shorts or inter element leakage. The tubes have mostly clear printed graphics, two of which have matching date codes of 839, the other has 726. Offered in original cartons, they are a little tattered, but not too bad. Pick up the tubes for your own radios or projects upcoming. 1950's vintage. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.