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 automatic movement into the spotlight, with an 80 hour power reserve and Nivachron™ balance spring, the Jazzmaster Open Heart is paired with a matching brown smoky leather strap, showcasing Hamilton's ever-evolving craftsmanship and attention to detail. Features WATCH Reference : H32675570Caliber : H-10Collection : JazzmasterMovement : AutomaticCase size : 40mmThickness (mm) : 11.05Dial color : BurgundyCase material : Stainless steelCrystal : SapphireLug width : 20mmPower reserve : 80 hourWater Resistance : 5 bar (50m)/73 psi (164ft)Anti Reflection : YesOpen Case Back : YesNivachron : Yes BRACELET/STRAP Strap reference : H6003261211Strap type : Calf leatherBuckle type : Pin buckleBuckle width : 18mm 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.