The 42 mm Jazzmaster Open Heart is a perfect combination of tradition and innovation. The perforated design with the utmost precision allows you to admire the Swiss-made Hamilton automatic movement in action while it marks the time and accompanies us in all the adventures of our lives. The multiple combinations of dials and straps made of high quality materials reflect the personality of the wearer and highlight the best of Hamilton. Three-sphere movement with date and power reserve greater than 80 hours, the H-10 features elaborate colimaçon and pearly contrasting patterns for the American Classic models and clean surfaces for the pilot's watches.