The A-4T Yankee IlluminatedTM features precision Swiss made mb- microtec® Trigalight® tritium gas filled illuminating hands & markers. The WWII inspired U.S. military vintage dial is combined with our innovative U.S. patented solid titanium case. This rugged 44 mm case is lightweight and ergonomic. Tritium, titanium case, sapphire crystal, and classic vintage dial work together to create this extraordinary timepiece. Durable U.S. patented solid titanium case with black ION finish • Integrated unbreakable titanium band retention lug bars • Hardened sapphire crystal • 100m/328ft. water resistance • Durable screw down crown and case back provide excellent protection against dust, debris, and water • Ergonomic offset crown does not impede wrist movement • Lightweight at only 2.28 oz. • Continuously glowing Swiss made mb-microtec tritium gas filled tubes in hands & markers • Swiss made all-metal jeweled precision quartz movement • 5 year battery life • Period authentic U.S. military dial with 12/24 hour markings and date • The U.S. patented Bertucci® DX3® Nylon band features rugged military spec. nylon webbing, heavy duty stitching and stainless steel buckle & dual loops to ensure long life. The Active ComfortTM one piece design is equipped with the Fold and TuckTM excess band retention feature and wide adjustment range to ensure a perfect fit for all wrist sizes w/ black ION stainless steel buckle and dual loops.