Let precision take center stage with the 40mm Jazzmaster Open Heart and its smoky burgundy cut-out Dial revealing the subtle beauty of this timepiece's inner mechanics. Bringing the H-10-S Auto Movement into the spotlight with an 80 hour power reserve and Nivachron™ balance spring the Jazzmaster Open Heart is fitted with an intricate stainless Steel bracelet showcasing Hamilton's ever-evolving craftsmanship and attention to detail.