chevron_left Movements and technical details

IWC 79320 vs. 7750

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    Apprentice
    29 Sep 2019, 2:48 p.m.
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    Hi All,

    New to the forum and I have a technical question. I've owned 7750 based
    movements before and I've had two with the same issue. They both suffered from
    the hour counter running continuously due to the use of a plastic hammer on
    the hour counter wheel. The plastic wears over time and is prone to slipping
    because of this and causing the continuous running issue. Does anyone know if
    IWC upgrades to a better material that isn't prone to wear?

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    Master
    30 Sep 2019, 8:59 p.m.
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    What you describe is not an issue as IWC heavily modified 7750 movements to be
    in line with IWC standards.

    After some time, ETA Stopped sending ebauches to Schaffhausen, and built 7750
    movements to IWC requirements and specifications.

    Right now, IWC has created its own new chronograph movement