Model: k918l movement: Swiss Ronda movement waterproof: 5atm mirror: synthetic sapphire dial: radial engraved dial strap material: 316L fine steel case width: 20mm.The unique cutting process radiates diamond like light, and the meticulous equilateral cutting makes the light dazzling. Time and care bring better details just to match your noble identity,This is the secret behind the waterproof. The 5atm waterproof standard requires each part to be accurate to 0.001mm. Behind the seemingly simple structure is the unremitting efforts of the design engineers day and night. What we do is just to make your life more calm and calm