The product is a vintage pocket watch mainspring winder by K & D Kendrick Davis. This tool is specifically designed for winding the mainspring of pocket watches, making it a valuable and rare find for watch enthusiasts and collectors. The brand K & D Kendrick Davis adds a level of authenticity and craftsmanship to the product, ensuring quality and reliability in use. Has been used gently with some normal wear from use . See pictures. Some marks on the case