
The following tests are applied to a statistically significant sample of production watches:
Pressure change test: The watch is submerged to 375 meters in one minute. It remains at that depth for two hours. It is then quickly brought up to a depth of three meters, where it remains for one hour. This is repeated twice to test resistance to both overpressure and sudden changes in pressure. Following this procedure, the watch must pass a condensation test to ensure that no water has penetrated the case.
Sand in the bezel test: The watch is submerged in a solution of salt water and sand. The bezel is then turned at a rate of two complete turns per second for 1.5 hours (a total of 10,800 turns). Bezel function must remain unaffected.
Temperature change test: The watch is placed in water at 40 degrees Cº, or about 104 degrees Fº, for 10 minutes, then moved to water at 5 degrees Cº, or about 41 degrees Fº, for 10 minutes, then back to 40 degrees Cº. Following this procedure, the watch must pass a condensation test to ensure that no water has penetrated the case.
Magnetic field test: The watch is subjected to a magnetic field at 4,800 A/m for four cycles of 1 minute each. Following the exposure, the watch must keep time to +/-30 seconds per day, and amplitude must be within 20 degrees, compared with figures obtained before the test.
Pressure on the case, strap and crown: The watch is exposed to simulated daily shocks including accidental drops, sports practice, and sharp movements. The strap is subjected to a force of 200 newtons, or about 45 pounds, for 1 minute. The watch is then submerged to 375 meters, where it stays for 1 minute. Finally, while at 375 meters, a force of five newtons, or about one pound, is exerted directly on the top, or dial side, of the crown for 10 minutes. Following this procedure, the watch must pass a condensation test to ensure that no water has penetrated the case.


The small “Diver’s Watch” inscription on the caseback can only appear on watches that satisfy ISO 6425 standards.
8,200$
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