Badische Uhrenfabrik Time and Strike serial 2363 with a 31 underneath

Discussion in 'Clock Repair' started by THTanner, Feb 7, 2019.

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  1. THTanner

    THTanner Registered User
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    Jul 3, 2016
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    Is there anyway to approximately date a GB movement with the above stamped in the back plate?
    The owner is not sure how old the clock is but it has been in the family for two generations.

    Other than being dirty and a bit worn, the only obvious problem to be addressed is the pivot hole for the center shaft in the back plate. It has been punched a bit and the pivot will need some cleanup and polishing. My question is when you encounter a punch like this do you put in a large enough bushing to completely remove the punch marks, or do you sometimes put in the smallest possible bushing that handles the pivot properly?

    I kind of hate to send it home with punch marks still showing, but don't want to ream out more than necessary if leaving old punch marks in place is usually acceptable.

    IMG_3553.JPG IMG_3556.JPG IMG_3559.JPG
     
  2. Willie X

    Willie X Registered User

    Feb 9, 2008
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    That "31" looks significant. Others will know more. Willie X
     
  3. THTanner

    THTanner Registered User
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    the 31 is the approximate pendulum length in cm - given the usual issues of how to measure it
     
  4. Willie X

    Willie X Registered User

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    Could be the date too. Probably a little older though ... Willie X
     
  5. David S

    David S Registered User
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    To answer the punch mark question. I would leave them alone unless they interfered with my making a functional, reliable repair. Punching around bearings has been done for decades, not only on clocks but all sorts of mechanical equipment. I always let my customer know the state of the movement as received along with pictures and discuss my approach. These old clocks have been serviced / repaired in the past and methods have changed over the years. I am not responsible for what occurred years ago, nor am I concerned that someone may think that I punched the pivot holes. Again as long as my repair is reliable.

    David
     
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  6. THTanner

    THTanner Registered User
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    thanks - that is probably what I will do - was just not sure how most handle it - it would be quite a large bushing for the center shaft and the T2
     
  7. THTanner

    THTanner Registered User
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    yes - i cannot find any serial number info - will see what comes in
     
  8. David S

    David S Registered User
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    I am not sure what the preferred answer is here. I tend to be pragmatic and a "form follows function" guy. Different time pieces may require different attention due their value and what is trying to be achieved. The best thing is to develop your own standards that both you and your customers are comfortable with.

    David
     
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  9. John Hubby

    John Hubby Principal Administrator
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    THTanner, first of all this isn't a Gustav Becker clock, it is made by Badische Uhrenfabrik as shown by the "B in crescent moon” Badische logo. I agree that the "31” stamp is the pendulum length. Good luck with the repair!
     
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  10. THTanner

    THTanner Registered User
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    thanks so much - I could not figure out the emblem and thought it was a stylized G
     
  11. wow

    wow Registered User
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    TH, in both bushings on the back plate, once you cut the hole for the bushing, I don’t think there will be much left of the punch marks. I would just bush it in the proper place and leave it. Polishing those punch marks may make them less visible.
     
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  12. THTanner

    THTanner Registered User
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    I am guessing the clock is at least 100 years old, and those two spots are the only work that has been done on any of the pivot holes.

    Here are pictures of the dial and the gong.

    IMG_3563.JPG IMG_3564.JPG IMG_3565.JPG
     
  13. shutterbug

    shutterbug Moderator
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    My approach to punch marks is to bush the hole as normal, and if the punch marks still show I leave them as part of the clocks' history.
     
  14. THTanner

    THTanner Registered User
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    thanks shutterbug

    could you modify the title and change the GB to Badische Uhrenfabrik as per John's note? I would hate for my mistake to remain in the record

    I looked at the gong base and mistakenly saw the crescent with the scratch as being some sort of G
     
  15. shutterbug

    shutterbug Moderator
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    Good idea. Done :)
     
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