The NOS Vintage Sealed Zenith 14A4 Radio Vacuum Tube is a rare find for collectors of vintage radios and electronic equipment. Made in the United States by Zenith, this single unit is a genuine piece of history from a bygone era. With its new old stock status, this vacuum tube is guaranteed to be in pristine condition and ready to be used or displayed in a collection. A valuable addition to any vintage electronics enthusiast's collection, this Zenith vacuum tube is sure to be a standout piece for those who appreciate historical artifacts from the world of radio technology. NEW UNOPENED OLD STOCK.