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HWD - Nightwatch

titanium tritium dive-watches

Hazard 4® Heavy Water Diver® watches glow continuously using self-powered tritium (H3) Swiss mini-lamps like in your pistol night sights - won’t fade overnight like luminescent paint. A Swiss-movement guarantees reliable accuracy. Built with 100% titanium, this 50mm large watch is only 1/2 the weight, but double the strength of a steel watch. A proven dive watch, it is water resistant to 300M / 990 FT depth. The unique, bold, military styling features easy-to-read numerals and our exclusive integrated 24-hour scale. The submarine-inspired aesthetics carry into the precision, 60-click uni-directional dive bezel topped with tritium zero indicator and the easy-turn screw-down crown. The face numerals are 3D stencil 2-layer design which along with angled chapter ring makes it not only tactical, but also a sophisticated timepiece suitable for the office or formal event. Available in an unprecedented range of tactical and urban oriented colors/finishes - they come equipped with a variety of straps and bracelets. Used in the most extreme environments by special forces, explorers, and professionals worldwide, it won’t let you down and makes an unforgettable formal present.

>> Heavy Water Diver Instruction Manual

>> Heavy Water Diver Dive Bezel How-To


Availability: In stock


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60 day return policy for a full refund minus shipping/handling fees or within 365 days for store credit.

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_ high water resistance feature set; depth rating of 300 m/990'
_ Ronda 515 Quartz (battery powered); standard battery life
   on our watches is about 2-2.5 years
from the day it is installed
_ battery type: 371
_ self-contained everglow tritium-vial lamps (tritium has a half-life
   of 12 years
, meaning that in 12 years, it will be half as bright as it is now)
_ tritium vials are not inset but 80% above the face surface;
   this makes them visible from the edges not just from above
_ titanium case is light, strong, and hypoallergenic
_ large, substantial, 50 mm high-vis design
_ aggressively knurled unidirectional bezel
_ bezel has tritium marker in "12" porthole
_ scratch-resistant sapphire crystal glass
_ crystal interior is anti-reflective coated
_ machined bezel markers won't scratch off
_ screw-down case-back and crown
_ the crown is large, grippy, and easy to turn
_ big, high-vis, 3D military stencil-cut numerals
_ unique 24-hour military time scale is integral
_ angled minutes inner-dial for better visibility
_ unique, user-service fast-change strap pins
_ boldly styled, broad, super legible hands
_ eye-catching retail graphic case-insert
_ easy strap changes w/ screw-in pins; use Torx 6 screwdriver/bit to
   remove strap (not included)

_ moisture wicking map texture under the rubber strap, combined
   w/ relief trench & many buckle holes keep the wrist dry
_ a selection of straps/bracelets coming soon

_ comes mounted with custom T.P.R. band
_ 1x military-grade thermoformed travel case

Additional Info

Additional Info

Case Material Titanium (bead-blast)
Case Finish Natural or P.V.D. Black
Case Diameter 50 mm
Case Thickness 15 mm
Strap Horn Width 24 mm
Depth Rating 300 m/990'
Movement Ronda 515 Quartz (battery powered)
Date Window Position at 4 o'clock
Product Weight ~3.8 oz (10.9 oz w/ case)
Design Long Beach, California - In-House Team.
Manufacturing Swiss Movement


Customer Reviews (1)

Hell of a watchReview by Moodyfirefighter
Some watches are built for looks, some built for function. Hazard 4 watches are both! Great fit & function, nite-time functions with out having to press a backlight, nice big over size light weight watch anyone can wear. Might not be a starter watch for people, but, once you understand what a quality watch is then you’ll be ready to buy into Hazard 4. (Posted on 8/7/2018)

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Product Questions

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What is the warranty for the watches

You can view our warranty for all our products here on our website:

Thank you for contacting us!
Customer Support answered on April 16, 2018
Can you get HWD Nightwatch with blue/red tritium?
Unfortunately we do not make the Nightwatch with blue/red tritium (it's only available in green/yellow), however we can pass your thoughts onto our design team for consideration. Sorry for any inconvenience brought. Thank you for being interested in our products!
Customer Support answered on December 10, 2018
in a few years, when the T25 are glowing less and I decide to change them: can you provide that service? Tx
Yes, we will be able to offer tritium replacement service.
Customer Support answered on December 1, 2018
What is the expected battery life and what is the procedure for changing the battery? Are new seals required each time?
Standard battery life on our watches is about 2-2.5 years from the day it is installed. However, there are many factors that can affect battery life, including extreme temperatures (hot or cold) and how long it has been in storage (as those are days in which the watch as been running). Regarding battery replacement, it is a simple procedure that can be handled by most watch shops (though we still suggest fully vetting any store you visit to avoid any unnecessary damage or services performed on your watch).
Customer Support answered on October 20, 2016
Does this watch come with a metal band?
Thank you for your question.

Unfortunately, the watch design does not come with a metal band.
Customer Support answered on March 28, 2017

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