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Isobrite Valor Series ISO403 Swiss Made T100 Tritium Illuminated Chronograph Isobrite Valor Series ISO403 Swiss Made T100 Tritium Illuminated Chronograph
Isobrite Valor Series ISO403 Swiss Made T100 Tritium Illuminated Chronograph
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Isobrite Valor Series ISO403 Swiss Made T100 Tritium Illuminated Chronograph

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2-Year Warranty & Free Shipping

17 ultra bright T100 tritium markers

The all-new ISO403 T100 tritium illuminated chronograph watch by Isobrite explodes on the scene with bursts of tritium rays emanating from the 12 o’clock bearing, which marks with ease the position and heading of the watch.

The trajectory of light from our new longer tubes not only assist and enhance with night vision read capabilities but also offer a higher quality and aesthetically pleasing timepiece.

The Ronda 5040.D movement in this Swiss Made chronograph assures the accuracy your mission requires with the added feature of a stopwatch. Whether you are an aircraft or vessel pilot, auto racer, diver, at the controls of a submarine or just a regular guy, this timepiece will assure you are properly equipped.

When your adventure involves going deep, this diving-approved watch is water resistant to 200 meters. Constructed out of lightweight carbon fiber reinforced polycarbonate and scratch resistant sapphire crystal, the watch weighs in at only 3 ounces. Plus, the included silicone strap provides the utmost in comfort and adaptability.


Illumination: 17 x Swiss-Made T100 tritium markers
Functions / Features: Chronograph, date display
Movement: Swiss-Made Ronda 5040.D quartz
Battery Life: Up to 54-months
Crystal: Scratch-resistant sapphire with anti-reflective coating
Case Diameter: 47mm
Case Thickness: 14mm
Case Material: Carbon fiber reinforced polycarbonate
Caseback: Stainless steel engraved plate fixed with 4 security screws
Bezel: Unidirectional ratcheting diver bezel with a tritium elapsed minute marker
Crown: Double-gasket push-in with side shields
Water Resistance: 200m / 660ft / 20atm
Lug Width: 24mm
Weight: 3 ounces
Warranty: 2 years

Comes with 2 bands and a tool to easily swap bands:
- a black silicone band with stainless steel hardware (pre-installed band, unless you opt for another option in the Select Your Band section above)
- a black nylon military-style band with stainless steel hardware
- a spring bar pin tool for swapping out bands

Design Features
Design Features

Swiss T100 Tritium Illumination

Isobrite T100 watches have tiny glass tubes that are filled with up to 100 mCi of tritium gas and then hermetically sealed. The electrons of the gas continuously react with phosphorescent paint resulting in a radio luminescent light source that glows constantly for many decades. No external power source or charging-by-light is necessary to maintain the glow. The glow is completely self-powered.

Scratch-Resistant Sapphire Crystal

The watch is protected by a scratch-resistant sapphire crystal with an anti-reflective coating. The strength and superior scratch resistance of sapphire crystal is the reason why it is used in nearly all high-end luxury watches.

Ultra Lightweight Case

The watch features an ultra lightweight and extremely durable carbon fiber reinforced case with a diameter of 47mm. The double-gasket push-in crown on the right side of the case is protected by two side shields. For keeping track of elapsed dive time, the case has a unidirectional ratcheting diver bezel with a tritium elapsed minute marker.

Swiss-Made Ronda Movement

The watch is powered by a reliable and accurate Swiss-Made Ronda 5040.D quartz chronograph movement with 13 jewels and gold plating. The chronograph function of the movement has a center stop second (1/1 second), a 1/10 second counter up to 30 minutes, a 30 minute counter, a 10 hour counter, and add and split functions. The movement also features a power saving mechanism that is activated by pulling out the crown and reduces battery consumption by approximately 70%. Ronda is one of the most respected makers of quartz movements and strictly adheres to an ISO 9001 quality control system to ensure that every movement meets the most rigorous standards.