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The "1000 Hours Control" test
by Jaeger-LeCoultre
Jaeger-LeCoultre subjects its watches to the rigorous "1000
Hours Control" test programme. Unique in its kind, this test
consists of 1000 hours of comprehensive, stringent checks.
The "1000 Hours Control" seal or marking, affi xed or
engraved on the back of your watch, certifi es that it has
undergone this observation programme in our laboratories
and has successfully passed all tests. The latter include rate
regularity checks, reactions to changes in temperature and
barometric pressure, resistance to shocks and magnetic fi elds,
as well as water-resistance tests at pressures of 3 atmospheres.
Your watch is therefore capable of withstanding the trials of
everyday life when you wear it on your wrist.
The criteria of the "1000 Hours Control" programme go far
beyond the offi cial timekeeping test standards, which concern
only part of the movement. Jaeger-LeCoultre tests both the
movement and the fully cased-up watch.
