Ingenieur Chronograph 3733 — Steel

Jaeger-LeCoultre 631

JLC meca-quartz chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. movementMovementThe working mechanism inside a watch or clock. (quartz timekeeping, mechanical chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display.) used in the Ingenieur ChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display..