• Science question, why do some manual watches have a much higher power reserve than automatics?

    Been looking at Panerai, a manual with an 8 day power reserve.
    When I got my Tudor they were bragging about the 3 day power reserve like it was 3 months, and such a good feature.

  • Because automatics don't need the reserve given. They self charge. Also space for the mainspring Vs the automatic component of the movement

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