Introduction
Welcome to the Luminox Navy Seal 3581.EY Military Dive Watch user manual. This guide provides essential information for the proper setup, operation, and maintenance of your timepiece. Designed for durability and precision, this Swiss-made watch is built to withstand challenging environments.

Image: Front view of the Luminox Navy Seal 3581.EY Military Dive Watch, showcasing its black dial, red accents, and robust design.
Setup
Setting Time and Date
- Unscrew the Crown: Gently unscrew the crown (located on the right side of the watch case) counter-clockwise until it is free.
- Set the Date: Pull the crown out to the first click position. Turn the crown clockwise or counter-clockwise to adjust the date. Avoid setting the date between 9 PM and 3 AM to prevent damage to the movement.
- Set the Time: Pull the crown out to the second click position. The second hand will stop. Turn the crown to set the hour and minute hands. Ensure the AM/PM is correctly set by observing if the date changes at midnight.
- Secure the Crown: Once the time and date are set, push the crown back in and screw it clockwise firmly against the case to ensure water resistance.
Bezel Operation
The unidirectional rotating bezel can be used to measure elapsed time. Rotate the bezel counter-clockwise to align the zero marker with the minute hand. As time passes, the minute hand will indicate the elapsed time on the bezel scale.

Image: The Luminox Navy Seal watch worn on a wrist, demonstrating its practical use during physical activity.
Operating the Chronograph
Your Luminox Navy Seal 3581.EY features a chronograph function for measuring elapsed time with precision.
- Start: Press the top pusher (A) to start the chronograph. The large red second hand will begin to move.
- Stop: Press the top pusher (A) again to stop the chronograph. The elapsed time can be read from the sub-dials.
- Reset: Press the bottom pusher (B) to reset the chronograph hands to zero.
The watch also features Luminox Light Technology (LLT), providing constant glow for up to 25 years without external light exposure. This self-powered illumination system ensures visibility in all low-light conditions.

Image: Diagram illustrating the components and function of Luminox Light Technology (LLT), highlighting the micro gas tubes.

Image: The Luminox Navy Seal watch dial illuminated by its self-powered Luminox Light Technology in a dark environment.
Maintenance
Cleaning
To maintain the appearance of your Luminox watch, clean it regularly with a soft, damp cloth. For rubber straps, mild soap and water can be used. Ensure the crown is fully screwed in before cleaning to prevent water ingress.
Battery Replacement
The watch requires one LR44 battery. Battery replacement should be performed by an authorized Luminox service center to ensure proper sealing and water resistance. Attempting to replace the battery yourself may void the warranty and compromise the watch's water resistance.
General Care
- Avoid exposing the watch to extreme temperatures or sudden temperature changes.
- Keep the watch away from strong magnetic fields.
- Rinse the watch with fresh water after exposure to saltwater or chlorine.
Troubleshooting
- Watch Not Running: If the watch stops, the battery may need replacement. Contact an authorized service center.
- Date Not Changing: Ensure the time is set correctly for AM/PM. If the issue persists, consult the service center.
- Reduced Illumination: Luminox Light Technology provides constant illumination. If the glow appears significantly dimmer, contact customer support.
- Water Inside Crystal: If condensation or water appears inside the crystal, immediately take the watch to an authorized service center. This indicates a breach in water resistance.
Specifications

Image: Detailed diagram outlining the key product specifications of the Luminox Navy Seal 3581.EY watch.
- Model: XS.3581.EY
- Case Material: CARBONOX™ (Chemical resistance, low thermal expansion, weatherproof)
- Case Diameter: 45 mm
- Movement: Swiss Quartz
- Bezel: Uni-directional rotating
- Crown: Double security gasket, crown protected
- Glass Material: Hardened mineral crystal (550-650 Vickers)
- Strap Material: Genuine rubber, 24 mm band width
- Water Resistance: 200 meters / 660 feet / 20 ATM
- Illumination: Luminox Light Technology (LLT) - Constant glow for up to 25 years
- Battery: 1 LR44 battery required
- Functions: Time, Date, Chronograph
Warranty and Support
Luminox watches are Swiss Made, ensuring high standards of quality and craftsmanship. For detailed warranty information, service requests, or further support, please refer to the official Luminox website or contact an authorized Luminox dealer.
It is recommended to keep your purchase receipt and warranty card for any future service needs.

Image: The Luminox watch presented in its protective case, alongside the included instruction manual and warranty information.
Product Videos
Luminox Navy Seal Watch Review
Video: A detailed review of the Luminox Navy Seal watch, highlighting its features and durability after years of use. This video is provided by a seller.
Luminox Blacked Out Watch Overview
Video: An overview of the Luminox Blacked Out watch, focusing on its design, features, and the practical aspects of its mineral crystal. This video is provided by a seller.