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Still up to date after 25 years:
Jaeger-LeCoultre’s Master Control Chronograph

Master Chronograph

The sleekly simple dial covers a hardworking, highly precise, high-performance chronograph movement with column-wheel and vertical coupling.
  • Material: Stainless steel with alligator-leather wristband
  • Caliber: Automatic, Caliber Jaeger-LeCoultre 751G
  • Diameter: 40 mm
  • Special features: Chronograph, 30-minute counter, 12-hour counter, tachymeter scale
  • Wempe reference: JC010160

The classic in a new look

How quickly time flies! Fully 25 years have passed since Jaeger-LeCoultre premiered its first Master Control collection. Despite time’s passage, the underlying quality philosophy has remained as valid as ever. It almost goes without saying that this 25th anniversary calls for the debuts of special wristwatches. One of three such timepieces is the purist Master Chronograph, which boasts a nostalgic charm. Its steel case is 40 mm in diameter, 11.7 mm in height, and resists water pressure to five bar. It houses automatic Caliber 751G with a 65-hour power reserve, which comprises 235 components. The balance is paced at 4 hz, which enables the chronograph to time elapsed intervals to the nearest eighth of a second. The column wheel chronograph’s two counters can tally up to 30 elapsed minutes and 12 elapsed hours. A tachymeter around the dial’s periphery can be used for the precise and uncomplicated calculation of average speed after traversing a marked kilometer. Each completed watch undergoes 1,000 hours of quality control testing. This ordeal, which ranks among the most rigorous in the watch industry, not only scrutinizes the movement, but also examines the watch in its entirety. The testing procedure runs according to clearly defined criteria, and daily rate deviations of only a very few seconds are acceptable. The watches undergo testing while in motion and while resting. They’re periodically subjected to impacts, temperature fluctuations, and magnetic fields stronger than those specified by the usual standards. The examiners also check the winding performance of the rotor, the guaranteed power reserve, and the hermetic seal of the pressure- resistant case that protects the caliber. Every wristwatch from Le Sentier accordingly copes with tougher conditions during the first 41 days and 16 hours of its life than it will be likely to encounter afterward on its wearer’s wrist. The examiners never blink: strict visual inspections preempt system errors. Only products that are impeccable in every detail ultimately find their way to customers all over the world.

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The Art of Horological Complications

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