Model/Reference: A006867 (Bara Cuda Series) Movement: Swiss Precision Quartz. Case Diameter: 40 mm (excluding the crown). This size is considered unisex or a mid-size men’s watch. Case Material: High-grade 316L Stainless Steel. Dial: Features a Mother of Pearl (white) base with the signature propeller-style rotating small seconds hand. Crystal: Scratch-resistant Sapphire Crystal. Water Resistance: 100 meters (10 ATM / 330 ft), suitable for swimming and snorkeling. Modular System: Fully compatible with Aquanautic's interchangeable bezels, straps, and protective "masks." Mask with gems. Crown: Patented safety locking system to ensure water tightness.