Manually Winding an Automatic

Thread: Manually Winding an Automatic

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  1. #1
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    Question Manually Winding an Automatic

    I have a Hamilton Jazzmaster Automatic -- great watch. I don't wear it every day, and I don't have a watch winder, so any harm by winding it on those days it will not be worn? Thanks!

  2. #2
    stuffler,mike
    Guest

    Re: Manually Winding an Automatic

    Nope, your automatic Hamilton can`t be overwind. If the movement is fully wounded the mainspring will slowly slip to protect against overwinding.
    But you need to do some mathematics to find out how many windings your Hamilton will need to run until the next day. Most automatics run from 38 to 42h if fully wounded.

  3. #3
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    Re: Manually Winding an Automatic

    I think the instruction booklet says the watch has a 36 hour power reserve -- but I have never achieved more than 17 hours -- in other words, at best, it stops after 17 hours (even aftet being worn regularly for 16 hours a day).

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  5. #4
    stuffler,mike
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    Re: Manually Winding an Automatic

    Quote Originally Posted by orahu View Post
    I think the instruction booklet says the watch has a 36 hour power reserve -- but I have never achieved more than 17 hours -- in other words, at best, it stops after 17 hours (even aftet being worn regularly for 16 hours a day).
    That´s strange

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