U-Boat has reinforced its collection of diving watches with the expansion of the Sommerso line, boasting an elegant two-tone dial and water resistance of up to 300 meters. Its satin steel case and unidirectional rotating bezel, with a two-tone ceramic insert in green and black, give it both an elegant and resilient touch. The dial features a 24-hour indicator and a visible ruby at 6 o'clock.