316L Surgical-Quality Stainless Steel Case Japanese Quartz Movement Sapphire-Coated Mineral Crystal Logo-Engraved Stainless Steel Caseback Metal Movement Holder Screw-Down Crown Genuine Leather Strap Logo-Engraved Stainless Steel Clasp Swiss Super Luminova Hands 42mm Diameter 20 ATM Water Resistance (Professional Deep Diving Approved)