This bead necklace features a design with a unique clasp that holds a US patent. The clasp is engraved with "PAT2007" on the front and "USA PAT 4074400" on the back, showcasing its unusual construction. The necklace is designed with gold-tone beads woven three-dimensionally, creating a simple yet striking presence. While the material is not precious metal, it's a piece that allows you to enjoy the aesthetic of costume jewelry or vintage accessories. [Condition] There is no noticeable damage, and the clasp opens and closes smoothly. There are minor scratches due to aging, so please check the photos for the condition. Recommended for those who appreciate US-made parts and unique clasps.