ProTek PT4101SF USMC Carbon Dive

This 45mm carbon composite dive watch combines durability and functionality with its 300-meter water resistance, unidirectional ratcheting bezel, and dependable Citizen/Miyota quartz movement with a 4-year battery. Featuring the Swiss self-powered Pro-Glo T100 tritium illumination system, it provides continuous glow for 25 years without needing a light source, ensuring visibility in any condition. The genuine rubber strap with a reinforced steel buckle adds strength and comfort for your adventures. SPECIFICATIONS 45mm Carbon Composite Case and 60-click Unidirectional Ratcheting Dive Timing Bezel 316L Stainless Steel Screw-in Embossed Signature Caseback 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 Citizen/Miyota 2035 Quartz 3-Hand Movement (with 4-year battery) Genuine Rubber Strap (22mm x 20mm) 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 T100 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: 82 grams, Lug width: 22mm