I have 2 of these that both test virtually the same with the same date code. This is for 1 tube but you will get a discount to buy both. The product is a vintage RCA 5U4GB rectifier tube from 1963, which is highly sought after due to its strong performance. It has been tested using a sencore mighty mite v tester and is known for its legendary black plate design. This particular tube was manufactured in the United States, adding to its collectability and desirability among vintage audio enthusiasts. Tubebx