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  1. #1

    Default Hamilton Model 21 Balance Wheel Lock

    Can you engage the balance wheel lock on a Hamilton Model 21 Chronometer while the clock is running, or, should you wait until the clock runs down?

  2. #2
    Registered User doug sinclair's Avatar
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    Default Re: Hamilton Model 21 Balance Wheel Lock (By: Barry Armstrong)

    There was a recent thread on the Chronometer forum which discussed locking of the model 21 balance wheel. If you check out that thread, you will notice that there was a balance wheel LOCK, and a balance wheel BRAKE. The LOCK (as shown in the thread) could not be applied with the chronometer running, period. The BRAKE (as shown in the thread) could be safely applied with the chronometer running. That thread shows a brake, and a lock. It depends on what you are referring to as a lock, as to whether the balance wheel would need to be stopped.


    I have added a link to that thread.
    Last edited by doug sinclair; 06-20-2016 at 08:50 AM.

  3. #3

    Default Re: Hamilton Model 21 Balance Wheel Lock (By: doug sinclair)

    I have moved this thread to the Chronometers forum for better exposure.
    “If one tells the truth, one is sure, sooner or later, to be found out.” - Oscar Wilde

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