Dive into the world of watchmaking with our curated selection of 500 mixed-size mainsprings, ideal for a variety of classic models including Hamilton, Elgin, and Waltham. Each mainspring is crafted from durable steel, promising longevity and consistent performance for your timepiece restoration or repair projects. Whether you're a seasoned watchmaker or a hobbyist, these genuine brand-compatible mainsprings are a staple for anyone looking to maintain the integrity of their vintage watch. Expand your toolkit with these essential components, carefully selected to ensure a perfect fit for your cherished timekeeper.