The Jaeger-LeCoultre caliber 631 is a quartz-based movement that drives a mechanical chronograph function. It contains 233 parts, a notably high count for a quartz caliber, and combines a 30-minute counter with a 12-hour counter. The movement was notably used by Jaeger-LeCoultre and IWC in their Pilot's Watch and Da Vinci chronographs.
Last updated 10 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Quartz
Display Type
Analog
COMPLICATIONS
Chronograph30-Minute Counter12-Hour Counter
QUICK FACTS
FOR WATCH DEALERS
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