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A Pin Vice, But Not As You Know It!


Geo

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    • This seems to be complicated case... We have many variables here and we need to exclude some of them to make some progress. We have plots that show amplitude variations, but we don't know if this variations are significant, as they can be 'amplified' or 'smoothed' by the software. So, some observation of the amplitude by eye will be of help. Then, if we really have not isochronical work, then the main reason for this would be the hairspring being not 'linear'. And not linear may be sometimes not only because 'touching', but because bad hairsping material structure. Some of the advanced watchmakers claim that repairing badly bent hairspring is useless, because this springs will never be isochronic again.  Well, my own observations are that such thing happens, but not in all the cases and it depends on the case if the result is acceptable or not. I will not suppose here that this spring has been repaired, but it has some strange behavior watching at it's work. It will be good if it is possible to test the movement with another balance or thest the balance on another movement...
    • The more common Jewel hole diameters are from about 0.07mm to 0.50mm. Those are the sizes in the Seitz jewel gauge tool.
    • Hello and welcome from Leeds, England. 
    • OK, several things to say here. The thought thay if with the old spring the movement works 16 hours, then replacing the spring will solve that - is totally wrong. With a new spring the movement probably will work for 17 hours. The power reserve is practically not reduced when the spring gets weak with the age. It is rather something wrong with the movement. As You worked on the hairspring, we need to  confirm that it is OK now before everything else. So, thake the lever out and do the free oscillations test. What is the result? I expect numbers, not only 'it is good' or 'it is not good'. Then, this is no jewels pin lever movement, so this is not unusual to have not well regulated or even worn escapement, this is the main reason that this kind of watches doesn't work as long and reliable as the jeweled escapement ones. You can find many of them with no wear at the crown and case, and this is because they stopped working normally pritty soon after purchase.
    • Welcome 🙂 Inherited watches are very tricky. Some of them, or all, do have sentimental value, perhaps not to you but perhaps to others in the family. Ruining them doesn't make you popular. Start on innocent watches who do no harm, not to your wallet nor to others 😉 BTW; for in the future it would be helpful to others to mention your location in your profile. Success 🤗  
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