The Jazzmaster Open Heart 36mm perfectly balances contemporary sophistication with refined craftsmanship. A precise cut-out design reveals our Swiss-made automatic movement in action as it keeps time through all of life's beautiful moments. A variety of dial and strap combinations made from high quality materials offer a range of options for the modern woman.JAZZMASTERStriking a perfect balance between tradition and sophistication, the Jazzmaster collection offers wearers the ideal timepiece for milestone moments, and beyond.SELF-WINDINDWrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.STAINLESS STEEL CASEA highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.SAPPHIRE CRYSTALSynthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.H-10 CALIBERA three-hand automatic movement boasting a superior power reserve of 80 hours and featuring a Nivachron™ balance spring.WATER RESISTANCEYour timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).