It's old and the box is dusty. The base is corroded, but it still turns on. It was used for about 10 seconds to check if it works. 100W spherical glass light bulb, 95mm in diameter, made by National. - Brand: National - Model: Ball Bulb - Shape: Spherical - Wattage: 90W - Diameter: 95mm Reference site (likely a successor product) https://www.yazawa.co.jp/products/item/8115/ Thank you for looking.