World Pilot Series IW377714 original open-mode flyer. 7750 automatic mechanical movement, 43 mm, men's power reserve: 44 hours Appearance diameter: 43 mm case thickness: 15 mm case material: stainless steel dial color: blue dial shape: round mirror material: double-sided anti-reflective convex sapphire glass mirror crown material: fine steel strap material: calfskin buckle material: steel waterproof depth: 150 meters