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Usage environment (temperature, magnetism, impact, etc.)
• Because mechanical watches use metal in parts for keeping accuracy, changes in
temperature, which cause metal to expand and contract, will affect the accuracy of the
watch.
• Because mechanical watches use metal parts, exposure to magnetic fields affects
their accuracy. In order to keep the watch accurate, do NOT subject it to strongly-
magnetized objects.
• Strong shocks also affect the accuracy.
Maintenance
Mechanical watches may become inaccurate due to insufficient lubrication or wear.
Have the watch disassembled and cleaned (overhaul) every 2-3 years (charge basis).
It may be difficult to restore the watch from degradation after long-term use to its initial
performance even after repairs.
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