Limited Edition of 1000 Pieces. Ball Watch Company Roadmaster Ocean Explorer Limited Edition DM3120C-S1CJ-BK. Those born to voyage beyond the horizon, ready to brave any storm. The Roadmaster Ocean Explorer equips you with a rotating external bezel that indicates high and low tides for a two week period, while our in-house movement module reveals spring and neap tides alongside an illuminated moon phase indicator. Designed to move against the current, it delivers toughness presented in a 41mm stainless steel case with robust water resistance. Its unique character and performance combine to create the ultimate watch for the open seas.