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 White ceramic Black ceramic Steel Case White and black highly resistant ceramic and steel case Bezel Steel fixed bezel, white and black-varnished sapphire Dial White and black-lacquered dial Crown Steel screw-down crown with black highly resistant ceramic cabochon Strap White highly resistant ceramic bracelet and steel triple-folding buckle Movement Self-winding mechanical movement Water Resistance50 Metres Caliber Calibre 12. 1