ISA Swiss 8176/2050

Historical ISA quartz GMT calibre with central hours and minutes, a central 24-hour second-time-zone hand, small seconds and date. The technical file specifies 25.60 mm diameter and 3.70 mm movement height. Unlike 8176/1990, this version does not have an alarm. The reference separately gives 5.70 mm total height. Attribution is to the historical ISA quartz range, not a claim of manufacture by the current ISA Timepieces Swiss SA mechanical-movement company.