The Bathyal Oscuro presents its black dial with a matte finish and deep sandwich cutouts with ample amounts of old radium color lume. The stainless steel case and bracelet are finished with a black DLC (Diamond-like Carbon) coating. The deep date window features a matching black date wheel with large and legible white numerals. The bezel features deeply grooved markers filled Superliminova to mark dive times. No-Play bezel clicks tight and makes a full 120 stops around the bezel for precise time marking. Each Bathyal is powered by a regulated Miyota 9015 movement, a  mechanical automatic movement heralded for its reliability and precision.