Butterfly Fly Upgrade Multi Function Model adopts the multifunctional 3836 movement, ensuring quality. The case features exquisite brushed craftsmanship on the sides, easily imitated. Recognize the movement in the picture. Classic upgrade, elegantly popular. Omega men s watch with a fully automatic mechanical movement, mineral reinforced glass, 316L stainless steel case, genuine leather strap, fashionable design for business and leisure. Case diameter is 40mm, thickness is 12mm. Outstanding product.