"In the midst of war, when precision was essential, America's World War II fighting forces relied on innovative ""hack"" watches, equipped with a unique lock-down mechanism to synchronize their movements to the second. Today, Bulova commemorates the bravery of those who relied on the accuracy of the timepieces with a special replica of its battle-tested hack watch. Stainless Steel Case Black Dial Luminous Hands and Markers Sub Second Dial Military Green Canvas Strap 39mm Case Width (Approximately 1 9/16"")"