The product is a vintage Western Electric engraved 114A Ballast Vacuum Tube with an engraved base, specifically designed for use with the filament. This unit was manufactured in the United States and is a collector's item for vintage audio and electronics enthusiasts. With its unique features and historical significance, this Western Electric 114A tube would make a valuable addition to any vintage audio setup or collection.

Note: filament checks ok. Tube does show age due to long term storage. Please see photos any questions please ask. Thank you.