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This is an automatic mechanical watch powered by a spring.
When wearing the watch, your arm’s movement rotates the oscillating weight to
wind the mainspring automatically.
• When your arm’s movement is small and/or a few, winding will become
insufficient. We recommend to wear the watch as long as possible or wind the
mainspring manually in such cases.
• Duration of movement after the mainspring is wound fully may differ depending
on models. For details, see the next page or "Specifications" (→ page
Winding the mainspring