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Heavy Water Diver™ - BLK PVD, BLK Dial/WHT Graphics

titanium tritium dive-watches

Hazard 4® watch hands & indicators glow continuously (night or day,) powered by an unusual, government-regulated technology that combines hydrogen-3 gas (tritium/H3), glass tubes, and phosphors into self-contained mini-lamps (expertly Swiss-made in many colors.) Tritium bulbs don't charge by battery, sun, or flashlight, unlike other watches using simple luminescent paint or battery-run film. They don't fade overnight like those paints, and require no button pushing, or battery to exhaust. They are also feather-light. Tritium lights are usually used only for critical applications like military compasses, and night-sights; we nevertheless source them, since our watches are used by those for whom timing can determine survival/success or catastrophe.

Availability: In stock


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Most orders will ship within the next 1-3 business days, provided the product ordered is in stock. Orders are not processed or shipped on the weekends or on national holidays.

Contact us for any questions about your order or product inquiries. We will be glad to check on it for you.

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

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_ self-contained everglow tritium-vial lamps
_ 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
_ high water resistance feature set
_ 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
_ 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 extra N.A.T.O. fabric strap
_ 1x military-grade thermoformed travel case

>> Heavy Water Diver Instruction Manual

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
Design Long Beach, California - In-House Team.
Manufacturing Swiss Movement


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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

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