Watch Features Specifications 42mm Carbon Composite Case and 60-click Unidirectional Ratcheting Dive Timing Bezel 316L Stainless Steel Screw-in Embossed Signature Caseback with USMC logo 316L Stainless Steel Screw-in Crown with Multiple O-rings Sapphire Crystal with Antireflective Coating (for glare-free viewing) Water Resistant to 300 Meters (all watches tested in both air and water) Dependable Japanese Seiko/TMI 24-jewel Automatic Mechanical 3-Hand and Date Movement Genuine Rubber Strap with Steel Signature Buckle (steel tube molded into the strap for spring pins to pass through for added strength and durability) Swiss Self-powered Pro-Glo T25 Illumination System Glows Continuously for 25 Years (no need to be "charged" by an external light source, and glows 100X time brighter than conventional photoluminescent lume systems) Weight: 84.65 grams, Thickness: 16.35mm, Lug width: 22mm This 42mm carbon composite dive watch is built for performance and resilience, featuring a 300-meter water resistance, a unidirectional ratcheting bezel, and an embossed USMC logo on the stainless steel caseback. Powered by a reliable Seiko/TMI 24-jewel automatic mechanical movement, it delivers precise functionality with no battery required. With Swiss Pro-Glo T25 tritium illumination providing 25 years of continuous brightness and a reinforced rubber strap for added durability, this watch is the ideal companion for challenging environments.