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Armourlite has extended the T100 Tritium Collection to include a true Swiss Chronograph (stopwatch) model with includes even more tritium illumination. The model ISO401 uses the T100 Tritium to fully illuminate the numeral 12 plus uses two tritium markers on the unidirectional bezel, 

The Isobrite Valor Series ISO401 watch by ArmourLite features a Swiss Ronda 5040.D Quartz chronograph movement, an anti-reflective scratch resistant sapphire crystal and water resistance down to 200 Meters (20 ATM / 660 FT).

Unlike ordinary tritium watches that use T25 tritium illumination, the Isobrite watches use ultra bright T100. This makes them up to 4 times brighter than the famous competition brand.

In addition, while most polycarbonate watches use mineral crystals, ArmourLite made the Isobrite watches with an anti-reflective scratch resistant sapphire crystal.

• MODEL #ISO401
• Swiss Made Ronda Caliber 5040.D Chronograph (Stopwatch) Movement
• Long Life 54 Month Battery
• Lightweight and Tough Polycarbonate Case
• Stainless Steel Caseback
• Anti-Reflective Coated Sapphire Glass Crystal
• Ultra Bright T-100 Tritium Gas Illumination (4 timed brighter that T25 Tritium Watches)
• Green Tritium on the Hour, Minute and Second Hands
• Two Green Tritium Markers on the Unidirectional Bezel
• Green Tritium on the Numbers 1 thru 11
• Six Orange Tritium Tubes Completely FORM the 12 o'clock NUMERAL
• Chronograph (Stopwatch) Accurate to 1/10th Second
• 30 Minute Elapse Time Register
• Continuous Second Hand Subdial
• Date Calendar Window at the 4:30 o'clock position
• Black Dial
• White Hands with Red Second hand
• White Easy-to-Read Hour Markers
• Silicone Rubber Dive Strap
• Clasp Type: Stainless Steel Buckle with logo
• Water Resistant to 660 Feet (200 meters) Below Sea Level
• BONUS: FREE NYLON STRAP

DIMENSIONS:

• Diameter: 47 millimeters (50 millimeters with setting crown and push buttons)
• Case Thickness: 12 millimeters
• Lug Width: 24 millimeters
• Maximum Wrist Length 9.75 inches