Hamilton H42535160 Jazzmaster Skeleton AutoSeamlessly blending tradition with innovation, the Jazzmaster Skeleton 40mm offers a glimpse of its Swiss automatic movement in action. Set in striking Empire green, the open-worked dial reveals the automatic H-10-S movement, featuring 25 jewels and an impressive 80-hour power reserve. This iconic timepiece is paired with a sleek stainless steel metal bracelet, exuding both modern dynamism and timeless appeal.JAZZMASTERStriking a perfect balance between tradition and sophistication, the Jazzmaster collection offers wearers the ideal timepiece for milestone moments, and beyond.FEATURESSELF-WINDINGWrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.SUPER-LUMINOVA®Super-LumiNova is a type of luminescent material applied to hands, dials and bezels to make them visible in the dark.STAINLESS STEELA 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.NIVACHRON™ BALANCE SPRINGNivachron™ is an alloy used to produce balance spring to resist magnetic fields and improve accuracy. It reduces the effects of magnets, temperature, and shocks.H-10-S CALIBERA three-hand automatic skeleton movement boasting a superior power reserve of 80 hours and featuring a Nivachron™ balance spring.