Historical ISA three-hand quartz calibre with a date display. The 2331/103 sheet specifies 25.60 mm diameter and 2.95 mm height, central seconds, quick date correction and a stop device. The official sheet also illustrates an optional big-date dial configuration; that option is not assigned to every example. Attribution is to the historical ISA quartz range, not a claim of manufacture by the current ISA Timepieces Swiss SA mechanical-movement company.
Last updated 2 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Quartz
Diameter
25.6mm
Height
2.95mm
Display Type
Analog
Winding
Quartz (Battery)
COMPLICATIONS
Date
FEATURES
Sweep SecondsHacking SecondsQuickset Date
QUICK FACTS
FOR WATCH DEALERS
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