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  1. #1

    Default this is a pocket chronometer?

    Hi everyone!

    Recently i bought an english silver pocket watch, George Priest, Norwich, serial 3937. This watch has also chronometer balance, but if i see good, it does not a chronometer escapement?
    This escapement is completely unknown to me. I upload some photos, maybe someone met with a similar one. Please help me, to identify this escapement.

    Best regards! Peter from Hungary
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  2. #2

    Default Re: this is a pocket chronometer? (By: sternerp)

    Hi Peter, is it a variation of the Savage 2 Pin Escapement? Others will know? I like it very much. Regards Ray

  3. #3
    Technical Admin Tom McIntyre's Avatar
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    Default Re: this is a pocket chronometer? (By: Omexa)

    At first glance it looks like a wide jewel Savage, but the key element that is missing is the impulse notch on the table. It has a passing crescent, so there is no impulse from a pin on the lever. A good closeup of impulse end of the lever would make it more clear. Here are some images from my collection. The drawing is the copyright property of David Penney and is used with permission.

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    Tom McIntyre Click me.
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  4. #4
    Registered User gmorse's Avatar
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    Default Re: this is a pocket chronometer? (By: sternerp)

    Hi Peter,

    As Tom has said, this isn't a Savage, but a variation on the two-pin English lever, albeit a rather superior one, with a single wide trapezoidal jewel and a passing crescent. The action is exactly the same as a normal English lever. The lever itself shouldn't look particularly different, it just has a wider fork. The thing that is unusual is the use of a chronometer-type balance of the Earnshaw pattern, something that's not often seen in a lever pocket watch.

    It's certain that it wasn't made in Norwich, and there may be some frame-maker's marks on the pillar plate under the dial. Something to look for when you come to dismantle it.

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  5. #5

    Default Re: this is a pocket chronometer?

    Peter - I have added this chronometer to the list I have been maintaining for non standard English levers. You will find a copy here

    http://mb.nawcc.org/showthread.php?1...=1#post1107939

    I have added it to the section 'Standard Lever Escapement with Dovetail Jewel (Dovetail Escapement) - for each entry there is a link to where the examples are listed.

    John
    Last edited by John Matthews; 06-07-2017 at 11:24 AM.

  6. #6

    Default Re: this is a pocket chronometer? (By: gmorse)

    Thanks very much everyone for the responses!

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