The J12 series watches are constructed mostly from high-gloss finished Ceramic which is extremely scratch resistant, keeping the watch looking stylish & new for a long time. FEATURESMaterials Black ceramic Steel Diamond Case Black highly resistant ceramic and steel case with sapphire glass caseback Bezel Fixed steel bezel set with 50 brilliant-cut diamonds (~1. 51 carat) Dial Black-lacquered dial set with 12 diamond indicators (~0. 09 carat) Crown Steel non screw-down crown with black highly resistant ceramic cabochon Strap Black highly resistant ceramic bracelet with steel triple-folding buckle Movement Self-winding mechanical movement Water Resistance50 Metres Caliber Calibre 12. 1