The Ultimate offers 200 meters of water resistance, sapphire crystal, durable black DLC protection, and a world-class Swiss Made signature. The ULTIMATE collection is produced in small series of only 99 pieces. The 45mm bold-looking Ultimates have CNC deep engravings "WRYST" on both sides of the case. All the references benefit from a screw-down crown, square buckle, and casing protected by DLC* technology (*Diamond-Like Carbon). This hard protection is the world's most resistant.