Swatch Sistem Arlequin SUTW402

It wears the 42 mm plastic Sistem51 case, 13.8 mm thick, with stick-and-dot markers and stick hands on the silver dial. The movement is automatic, held together by one central screw, and runs for 90 hours on a full wind. Its rotor turns around the edge of the movement, leaving the works on show through the caseback. Swatch seals the movement into the case with structural adhesive, so it cannot be serviced.

The nearest plastic siblings keep the same case and change the dial: the Sistem Fudge (SUTC401) has the same markers on a brown sunburst dial, the Sistem Chic (SUTB402) has Arabic numerals on matte white, and the Sistem Black (SUTB400) has a black dial. The steel Sistem51 Irony models, such as the Sistem Earth (YIS400), put the same movement in a stainless steel case.