Defined by sharp lines and sweeping curves, the Waterbury Sub-second features an enhanced 39mm stainless-steel case with a slimmer profile and an elegant two-tiered bezel. Encircling the silver-white dial are Roman numeral markers and a rail track, paired with a 24-hour format sub-dial just above 6 o’clock. This sophisticated timepiece is paired with a slip-thru fabric strap that's double-layered for durability.