ISA Swiss 127

Two-hand quartz calibre of the historical ISA Swiss range. The preserved ISA 127/130 technical sheet specifies a round 17.20 mm movement, 1.40 mm high, with eight jewels and a stepping motor operating at three steps per minute. Attribution is to the historical ISA quartz range, not a claim of manufacture by the current ISA Timepieces Swiss SA mechanical-movement company.