Skip to content

Isobrite Valor Chronograph Series ISO403


Notify me when back in stock


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.

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

Illumination: 17 x Swiss-Made T100 tritium markers by trigalight®
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 tritium elapsed minute marker
Crown: Double-gasket push-in with side shields
Water Resistance: 200m / 660ft / 20atm
Band Material: Silicone
Band Width: 24mm
Band Clasp: Stainless steel buckle with logo
Weight: 3 ounces