ISA Swiss 8176/1990

Historical ISA quartz GMT and alarm calibre with a central 24-hour hand, a separate alarm hand, small running seconds and a date display. Its movement height is 3.70 mm; the reference distinguishes a 6.80 mm total-height measurement. Local time setting also moves the minutes hand, so the second-time-zone arrangement should not be described as a conventional independent-hour traveller GMT. Attribution is to the historical ISA quartz range, not a claim of manufacture by the current ISA Timepieces Swiss SA mechanical-movement company.