The “1,000 Hour Test” by Jaeger‑LeCoultre
The Jaeger‑LeCoultre Manufacture pays special attention to the quality and final testing of its watches. The 1,000 Hour Control is a program of internal certification tests for each of the models in our collection as well as internal production tests of your watch that exceed official chronometry tests. This program includes movement testing before and after casing the watch and extends throughout the entire watch assembly, according to conditions that closely assimilate daily wear.
The “1,000 Hour Control” mention or seal engraved on the back of a watch attests that each of the models in our collection has successfully passed all certification tests and that your watch has passed all the production tests that ensure its regularity, resistance to temperature changes and atmospheric pressure, robustness to shocks and magnetic fields, as well as waterproofing tests.