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gedwards

gedwards

By gedwards
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gedwards New Member

gedwards

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Good afternoon. Very new to this but I am very interested in beginning to repair mechanical watches. I have watched many of your videos on youtube and have gotten some great information. As I said, I am completely ignorant of how to even begin watch repair and servicing. But a friend has entrusted me with some practice watches to start with because he would like for me to try to repair his BREITLING for BENTLEY MOTORS CHRONOGRAPH. It has a two button function in addition to the crown. The watch runs and keeps time but needs the top button to the ?chrono/tachy? replaced. The button is completely missing. Is this an easy part to order and replace or am I in over my head?

 Thanks in advance for your help.

Glenn Edwards 

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    • Neverenoughwatches
      Setting lever spring

      By Neverenoughwatches · Posted

      This set lever seems to working ok unhardened Nickelsilver, might it deform if i leave it that way ?
    • nickelsilver
      Setting lever spring

      By nickelsilver · Posted

      I found this from a while back CS100 seems fine, but at around 500 Vickers it's not quite as hard as "blue" steel, but still harder than annealed. I'd try to find annealed (the post above has a U.K. supplier of small quantities).
    • Neverenoughwatches
      Setting lever spring

      By Neverenoughwatches · Posted

      As an experiment i was thinking of not hardening it to see how it fairs. Now that i have a complete template i could knock up another in half the time if this loses its elasticity. I might play about with a few pieces today to test their bending and spring properties. This was cs 100 the supplier quoted in annealed state, it was nice to work with files so I'm taking it thats its state. What you are looking seems like it would need annealing to work it. This is why i went for this stuff that cuts out that process, it was so easy to work.
    • dnhb
      Is this a 'hack' ?

      By dnhb · Posted

      Showing state of hairspring on receipt, backplate & 'dished' wheel.  Thanks, Nev. Amplitude v. weak - balance wheel turns over arc of only ~20deg. Don't know how to calculate movement rate or safely vibrate balance spring! Meantime I have reduced the 'dishing' & clock no longer runs for more than a few minutes except face down which supports my theory that it was 'dished' as a hack to avoid doing a proper repair.
    • mikepilk
      Setting lever spring

      By mikepilk · Posted

      I would harden and temper (to a light blue). It's so easy to do and only takes a couple of minutes. A search on ebay UK for "spring steel strip cs" finds plenty available in small quantites and thicknesses from 0.1mm up.  But the question is ( @nickelsilver) which "CS" number is best for watch parts ?  Also, from one of the ads : "CARBON SPRING STEEL. SIZE IS METRIC 15.00mm X 0.10mm X 304 MM  CS100 FINISH BRIGHT . HARDENED AND TEMPERD TO 480-530VPN" I've no idea about 480-530VPN. Does that mean it needs annealing before working?       Have you seen this video, he shows how to determine where the indents go ?  
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