The J12 stands the test of time on your wrist. Its ceramic overcomes every obstacle when faced with the most rigorous tests in simulated extreme conditions: millions of abrasive grains of sand, thousands of shocks, and dozens of hours under the sun’s UV rays. Black highly resistant ceramic and steel case Steel fixed bezel set with 50 brilliant-cut diamonds (~1.51 carat) Black-lacquered dial set with 12 diamond indicators (~0.09 carat) Steel non-screw-down crown with black highly resistant ceramic cabochon Black highly resistant ceramic bracelet and steel triple-folding buckle. Self-winding mechanical movement.