Offering a glimpse of its powerful inner mechanics, the Jazzmaster Open Heart lets precision take center stage with a new 42mm dial. Featuring a captivating midnight blue dial that sparkles, this showstopping timepiece fuses the modernity of urban architechture with the infinity of the cosmos. Showcasing Hamilton's ever-evolving craftsmanship and attention to detail, the dial brings the H-10 automatic movement into the spotlight. With its 80 hour power reserve and Nivachron™ balance spring, the Jazzmaster Open Heart Auto is fitted with an intricate stainless steel bracelet. Discover our collection of dress watches. WATCH Collection: Jazzmaster Movement: Automatic Case size: 42mm Thickness (mm): 11.44 Dial color: Blue Case material: Stainless steel Crystal: Sapphire Lug width: 22mm Power reserve: 80 hour Water Resistance: 5 bar (50m)/73 psi (164ft) Anti Reflection: Yes Open Case Back: Yes Nivachron: Yes MOVEMENT H-10 A three-hand movement with or without a date function and boasting a superior power reserve of 80 hours, the H-10 appears with intricate contrasting snail and pearled patterns for the American Classic models it drives and streamlined surfaces for the pilots’ watches. BRACELET/STRAP Strap type: Stainless steel Buckle type: Folding clasp Buckle width: 20mm REF: H32705140