This vintage Dur-O-Lite green mechanical pencil is a unique collectible item with a continuous twist mechanism. Made in the United States, it features a 1.18 mm HB lead diameter and is crafted from a combination of plastic and metal materials. The pencil is adorned with advertising for Bell System Property, adding to its historical and nostalgic appeal. Ideal for collectors of vintage writing instruments, this Dur-O-Lite pencil is a rare find that showcases the quality craftsmanship of its time.