VTG Napier double twist curb chain collar necklace, gold tone and signed

VTG Napier double twist curb chain collar necklace, gold tone and signed Purchased in a lot at auction, so I do not know the backstory/material. Sorry! Pre-owned condition, please see all pics for details of wear and let me know if you have any Qs about the item, about bundling, etc. Smoke-free, pet-friendly home **To be eco-friendly, your item will be carefully packed/protected in clean, pre-used materials VTG Napier double twist curb chain collar necklace, gold tone and signed