A Scratched and Gouged Hamilton 4992B

Discussion in 'Watch Repair' started by Paul_S, Feb 18, 2017.

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  1. Paul_S

    Paul_S Registered User
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    Mar 27, 2015
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    Around a year ago Dewey posted pics of a 992B with gouges carved from the gold screws.

    I thought of that when cleaning this watch for a friend: a 4992B.

    Someone went to town on nearly all the screws.
    attachment.jpg

    When replacing the staff, he scratched an arrow on the balance arm to show the stud position.

    attachment.jpg

    Most odd, though, is the collet. It looks like most of it has been roughly carved away. I'm not sure what would cause someone to do that.

    Sigh...

    Are these the sorts of things the military watchmakers did when trying to quickly turn-around a watch, or is this just another example of bad work in general?
     

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  2. doug sinclair

    doug sinclair Registered User

    Aug 27, 2000
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    That is a typical hairspring collet. No butchery there. Unusual to see that someone had a problem poising the wheel.
     
  3. Skutt50

    Skutt50 Registered User

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    #3 Skutt50, Feb 18, 2017
    Last edited: Feb 18, 2017
    Post deleted. I missed Doughs ironi!
     
  4. doug sinclair

    doug sinclair Registered User

    Aug 27, 2000
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    Irony:???:? What was ironic about my reply? That is a typical hairspring collet for all the 992B movements, and clones! As to the obvious problem someone had in poising the balance wheel. These are a friction staff, not riveted. And usually require little effort to poise. If you see something wrong with that reply, make your point!

    And my name is DOUG! Not Dough.
     
  5. Skutt50

    Skutt50 Registered User

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    I am sorry DOUG. Diod not mean to offend you.

    I work mainly on european watches and compared with the collets I have come across, the collet looks like it is half a collet. If that is the way the 992B are supposed to look then I stand corrected and I am glad I learned something new today.
     
  6. Paul_S

    Paul_S Registered User
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    Sorry for my bad picture, but the collet is sort of smashed and a little shaved, like someone staked it on off-center.

    As for the poise, so much weight was taken from so many screws that it is hard to know what the person was doing.

    The scratch marks (like an arrow on the arm) make me think this was serviced by a military watchmaker---it seems more likely that they'd do it to a military watch than a civilian would later---but that's just conjecture.
     
  7. NC Plumber

    NC Plumber Registered User

    Jan 15, 2011
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    I've replaced collets that looked much better than that one. Appears that it's gapped open on one side of the staff, I don't think that it is gripping very well or perfectly centered. Someone other than a watchmaker has been working on that balance.
     
  8. Jim Haney

    Jim Haney Registered User
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    Sep 21, 2002
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    Yes, You have hit the nail on the head.

    If someone who even had a small amout of repair skills they could have used the meantime screws to achieve what they were trying to do with drilling out material from the screw heads.
     
  9. ANDY YALE

    ANDY YALE Registered User

    Jun 14, 2013
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    looks like the upper pivot got bent in the process. what gets me is what was used to reduce the screws? the gouges are all off center.
     
  10. karlmansson

    karlmansson Registered User

    Apr 20, 2013
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    Probably a cutter/drill held in a pin vise. And as for the collet it looks like someone tried to grab it in a collet of some sort. Maybe for closing it. Or grabbing it in order to turn it and subsequently slipping.
     

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