Jazzmaster Open Heart Auto 42mm Green Dial

Open-heart styling is the draw of the Hamilton Jazzmaster Open Heart Auto H32705160. A gradient green dial has an aperture that exposes the movement, and the 42 mm stainless steel case measures 11.44 mm thick, with an exhibition case back that adds a second view of the works.

The movement is the Swiss-made self-winding Caliber H-10 with a Nivachron balance spring and up to 80 hours of power reserve. A sapphire crystal protects the dial and the watch is rated to 5 bar, or 50 meters. The stainless steel bracelet closes with a folding clasp. A good fit for someone who enjoys watching a mechanical movement and wants a dressy watch that is not too slim to feel substantial.