Designed with pilots in mind and built for a life of adventure, the Khaki Aviation X-Wind Automatic Chronograph flies through the crosswinds in a bold new guise, with camouflage patterns and new color variants extending across the dial, strap and case. Featuring an inner rotating bezel and an anti-magnetic Silicon hairspring, this high-performance piece has combat-chic looks and assertive style.KHAKI AVIATIONThe Khaki Aviation collection perfectly displays Hamilton's technical know-how when it comes to creating reliable watches for pilots and urban aviators. 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.SILICON BALANCE SPRINGSilicon balance springs offer various advantages: immune to magnetic fields, temperature fluctuations, oxidation, aging, shocks, and maintains shape stability.H-21-SI CALIBERA powerful automatic chronograph movement featuring an extended 60-hour power reserve. Equipped a state-of-the-art balance spring made from the anti-magnetic material silicon.WATER RESISTANCEYour timepiece is resistant up to 10 bar (100m) / 145 psi (328 ft).