Tradition meets innovation in the Jazzmaster Automatic 40mm. Roman numerals on the dial add distinct style and our H-10 movement with its anti-magnetic NivachronTM balance spring guarantees precise accuracy. Anything is possible with this high quality timepiece offered with a variety of dial and strap combinations. CASE Case material: Stainless steel Case size: 40mm Thickness (mm): 11.05 Dial color: Black Crystal: Sapphire Lug width: 20mm Power reserve: 80 hour Water Resistance: 5 bar (50m)/73 psi (164ft) MOVEMENT Caliber: H-10 Movement: Automatic A three-hand movement with or without a date function and boasting a superior power reserve of 80 hours, the H-10 appears with intricate contrasting snail and pearled patterns for the American Classic models it drives and streamlined surfaces for the pilots’ watches. BRACELET/STRAP Bracelet: Stainless steel Buckle type: Folding clasp Buckle width: 18mm REF: H42535130