Hamilton H24625330 Ventura XXL Skeleton Auto 46mm x 46mmFeaturing unique precision cut-outs on its extra-large dial, the Ventura XXL Skeleton Automatic demonstrates the power of rare and extraordinary design.VENTURAIconic, groundbreaking and a design classic, the Ventura is more than 60 years old but has the same rebellious appeal as it did on its launch day.SELF-WINDINGWrist 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.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.WATER RESISTANCEYour timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).