Hamilton H76419951 Khaki Aviation Pilot Pioneer Mechanical 36mm x 33mmOur stunning aviation blue takes this 1970s Royal Air Force re-issue higher than ever. Strap on the Khaki Pilot Pioneer Mechanical and celebrate Hamilton’s history in timing the skies.KHAKI AVIATIONThe Khaki Aviation collection perfectly displays Hamilton's technical know-how when it comes to creating reliable watches for pilots and urban aviators. MANUAL WINDINGWind your mechanical watch by turning the crown clockwise until it blocks.SUPER-LUMINOVA®Super-LumiNova is a type of luminescent material applied to hands, dials and bezels to make them visible in the dark.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.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-50 CALIBERAn exclusive caliber specifically developed for our handwinding watches, the H-50 has an extended power reserve of up to 80 hours.WATER RESISTANCEYour timepiece is resistant up to 10 bar (100m) / 145 psi (328 ft).