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The Navy SEAL Chronograph 3581 Blackout takes tactical timekeeping to its stealthiest form. Featuring a bold 45mm CARBONOX™ case and matching black dial, bezel, and strap, this chronograph is built for low-profile performance in any environment. As an evolution of the standard Navy SEAL watch, this model adds a 3-dial chronograph function for advanced timing capabilities without compromising its ultra-durable, lightweight design. Water resistant to 200 meters and equipped with Luminox LLight Technology, the 3581 Blackout stays visible for up to 25 years, no matter the mission, no matter the lighting.