Water & Dive
Purposeful watches with strong legibility and model-specific water resistance, including the famous Navy SEAL families.
Marcus Tempus
Product Story
Purpose-built, uncompromising and unmistakably Luminox, the Navy SEAL XS.3551.BO takes one of the brand's best-known tactical designs and gives it a stealthy all-black finish.
Its lightweight 44mm CARBONOX™ case is paired with a unidirectional rotating bezel and integrated black nitrile rubber strap. The monochrome dial continues the blackout aesthetic, while Luminox Light Technology uses 16 self-powered illumination tubes to provide constant visibility in low-light conditions for up to 25 years.
Designed with genuine capability behind its military-inspired appearance, the watch features an anti-reflective sapphire crystal, protected screw-down crown and 200 metres of water resistance. Inside, the Swiss Ronda 515 quartz movement provides dependable time and date functionality.
The 3550 Series draws upon Luminox's long association with the U.S. Navy SEALs, which began in 1992. At just 71g, the XS.3551.BO combines substantial wrist presence with the remarkably lightweight construction that makes CARBONOX™ particularly well suited to an everyday performance watch.
Features
✦ Model: Luminox Navy SEAL XS.3551.BO — 3550 Series
✦ Swiss Made
✦ Movement: Swiss Ronda 515 quartz
✦ Functions: Time and date
✦ Case: CARBONOX™
✦ Case Diameter: 44mm
✦ Case Height: 16mm
✦ Case Back: 316L stainless steel, screw-on
✦ Bezel: Unidirectional rotating bezel
✦ Crystal: Sapphire crystal with anti-reflective coating
✦ Crown: Screw-down crown
✦ Illumination: 16 Luminox Light Technology tubes
✦ Visibility: Constant glow for up to 25 years
✦ Water Resistance: 200 metres / 660 feet / 20 ATM
✦ Strap: Black nitrile rubber
✦ Lug Width: 24mm
✦ Buckle: CARBONOX™
✦ Weight: 71g
Marcus Tempus Brand Passport
MT-BP-002
Swiss Performance Watches
Luminox
Brand Passport • Swiss Made • Since 1989Founded1989
WatchmakingSwiss Made
Signature TechnologyLuminox Light Technology
IlluminationSelf-powered for up to 25 years
Performance HeritageNavy SEAL collaboration
Design WorldSea • Air • Land
Performance on the Wrist
Made to Be Read at a Glance
Luminox watches combine strong dial contrast, practical case construction and highly visible markers with a distinctly purposeful design language.
The result is a watch that feels equally at home outdoors, on the water or in everyday life — with the visual character to remain unmistakably Luminox.
The Technology
Luminox Light Technology
Luminox Light Technology uses tiny borosilicate glass capsules containing micro gas lights on the hands, hour markers and, on selected models, the bezel.
Unlike conventional luminous paint that must first absorb light, LLT is self-powered and designed to provide continuous visibility for up to 25 years.
24/7
Visibility without external charging
A Defining Chapter
The Navy SEAL Connection
In 1992, Navy SEAL research and development officer Chief Nick North worked with Luminox to develop a watch suited to the demanding needs of the SEALs.
That collaboration helped establish the Original Navy SEAL 3000 Series and became one of the most recognisable parts of the Luminox story.
Purposeful Materials
CARBONOX™
CARBONOX™ is Luminox's carbon-based case material, developed for watches where low weight and robust construction matter.
Luminox describes CARBONOX™ as six times lighter than steel and three times lighter than titanium, while also being non-metallic, anti-magnetic and resistant to changing weather conditions.
The Luminox World
Sea. Air. Land.
Aviation Influence
Watches inspired by cockpit clarity, technical readability and the practical requirements of aviation.
Outdoor Performance
Rugged watches designed for everyday adventure, field use and reliable visibility beyond the city.
Choosing Your Watch
Specifications Vary by Model
Luminox collections include different case materials, movements, crystals, case sizes and levels of water resistance. Some models use quartz movements while others are automatic.
We therefore list the exact technical specification on each Marcus Tempus product page rather than applying one specification to the whole brand.
Care & Water Resistance
Keeping a Luminox Ready for Use
Water resistance is not permanent. Luminox recommends that gaskets are inspected and replaced every 18–24 months, or more frequently when a watch is regularly exposed to chlorinated pools or salt water. The exact water-resistance rating should always be checked on the individual model.
Luminox Questions
Frequently Asked Questions
What is Luminox Light Technology?
It is a self-powered illumination system using micro gas lights inside tiny glass capsules to provide continuous low-light visibility.
How long does LLT last?
Luminox states that its self-powered illumination is designed to remain visible for up to 25 years.
Do Luminox watches need light to charge?
No. LLT does not rely on external light to charge in the way conventional luminous paint does.
What is CARBONOX™?
It is a lightweight carbon-based material used by Luminox on selected watch cases and components.
Are all Luminox watches waterproof to the same depth?
No. Water resistance varies by model, so the individual watch specification should always be checked.
Are all Luminox watches quartz?
No. The range includes quartz watches as well as selected automatic models.
Explore Luminox
Discover the Collection
Explore our current Luminox watches online, or visit Marcus Tempus to see selected models in person.