Sylvania Electrical tube 3cb6 new in box  Untested, from original owner my father.  He used to work in a radio repair shop in the early 1940's Marty and Fred Marfred Radio in Paterson NJ.  He kept on fixing items for his own use until the tubes went out of style.  New in box.   I have other collectible items as well as a full men's clothing store.  You may pair this with a new tank top, t shirt, underwear or socks and save even more at my men's store Menscave7.  I have lots of other jeans, swimwear including Polo, Nautica, Speedo, casual designer shorts and casual polos, concert t shirts, athletic shorts and muscle tops, fall and winter clothing, vintage cuff links, sweaters, sweat pants and over 2,200 more in my store!  !    Thank you for having a look and stopping by I list often so come again.  *I follow ebay rules and sell pre worn clothing in excellent condition and cleaned.