Casio A159W. Module 593, 1989Casio Module 593: A Revolutionary Digital Watch of the 1980s The Casio Module 593 is a digital watch that was first introduced by the Japanese electronics company Casio in the 1980s. At the time of its release, the Module 593 was considered a revolutionary timepiece due to its advanced features and cutting edge technology. One of the most notable features of the Module 593 was its stopwatch function, which allowed users to measure time with incredible