Built to ISO 6425 standards, this Marathon Watch Search and Rescue Medium Divers Quartz Wristwatch was specifically crafted for optimal performance during search and rescue missions. Marathon crafted these Men's Watches with self-illuminating tritium gas tubes that will emit a nonstop glow for up to 25 years. You'll find these tubes on each hour marker as well as both the hour and minute hands. To ensure your safety on a mission, this Marathon Watch Search and Rescue 36mm Watch is certified for water resistance down to 30 ATM - 300m underwater. The glass on this timepiece consists of scratch resistant sapphire crystal that will provide clear views no matter what. Plus, the body is made out of 316L surgical grade stainless steel for maximum durability. Please note that when you first receive this watch, there are no pre-made holes on the strap. You must carefully pierce the hole yourself which ensures a custom-made fit. Worn by troops and civilians alike, the Marathon Watch Search and Rescue Swiss Watch is a premium-grade wristwatch that is not only sleek and fashionable, but it may help save lives one day. Specifications for Marathon Search and Rescue Medium Divers Quartz Wristwatch: Manufacturer: Marathon Gender: Unisex Band/Strap Color: Black Case Color: Black Case Material: 316L Surgical-Quality Stainless Steel Case Diameter: 36 mm Band/Strap Material: Vulcanized Rubber Wrist Band Type: Strap Illumination Type: Tritium Water Resistance Level: Water Resistant Condition: New Country of Origin: Switzerland Age Group: Adults Features of Marathon Search and Rescue Medium Divers Quartz Wristwatch: Self illuminated 24/7 tritium gas tubes for up to 25 years Built to ISO 6425 standards certified for water resistance down to 30 ATM - 300 meters (1000 feet) underwater Scratch resistant sapphire glass crystal to maintain maximum legibility Built from 316L surgical grade stainless steel Package Contents: Marathon Search and Rescue Medium Divers Quartz Wristwatch