5U4GB / 5AS4A Westinghouse VACUUM TUBE - GUARANTEED

Westinghouse 5U4GB / 5AS4A Rectifier VACUUM TUBE, in box. Part of a large cache of tubes - comes from my personal collection of tubes, this one has a manufacturing date of the 22nd week of 1968. Pretty sure I bought this one from a Villa-Mart (later Valu-Mart) Tube testing kiosk in Beaverton, Oregon in about 1970 (price still attached), never used. Tubes have not been recently tested, but are nevertheless GUARANTEED against DOA. Images do an adequate job of representing the item.