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Posted

Hello, I am new to this website, but a watch lover. I have a mechanical watch which is pretty old, and it's crown broke from inside when i was trying to wind it up. The crown has come apart with the stem, and the gears linked to this stem are still inside the watch. Does anyone have any advice as to what I should do? Get a new crown or is there any way to fix this already broken one?

Posted
35 minutes ago, muhammadsarimkashif said:

Hello, I am new to this website, but a watch lover. I have a mechanical watch which is pretty old, and it's crown broke from inside when i was trying to wind it up. The crown has come apart with the stem, and the gears linked to this stem are still inside the watch. Does anyone have any advice as to what I should do? Get a new crown or is there any way to fix this already broken one?

The crown is not broken, but maybe the stem is. Maybe you broke trying to wind a watch that doesn't run. You can post a clear picture to show, but in the end the best would be that you bring it to someone reputable for repair.

Posted
9 minutes ago, muhammadsarimkashif said:

With a screwdriver, I was able to wind up the mainspring, and again using a screwdriver, i was able to run the pin lever back and forth, causing the watch to tick

Which means that it doesn't run. A watch that runs gets ticking by itself as soon is wound.

Posted

No actually, it's doesn't have a proper balance spring. It's gotten all twisted around the balance wheel. I made it run by first removing the balance wheel, and then using the screwdriver. I worried that now that the crown is broken, its not worth it to repair the watch.

Posted
7 minutes ago, muhammadsarimkashif said:

 I worried that now that the crown is broken, its not worth it to repair the watch.

Quite possibly it is so, but without a picture (always worth thousands words), we can't know what we're talking about.

Posted

Hi  A photograph of the watch with the back off showing the mechanism in close up would be helpful in acertaining what the problem is also include the stem and crown.    Thanks

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    • Good stuff, thanks!!!  I'm going to save it and re-read your post and watch the video again.  I have a few follow-up question:  My understanding is that the spring vibrates or breathes between the the two regulator pins. When the pins are fully open the effective spring length is from the stud and theoretically no rate adjustment can be made by moving the regulator arm. As the pins are closed the spring gets closer to one side of the regulator block but doesn't touch a pin. You can still move the regulator carrier the entire terminal curve without upsetting the coils.  The rate can now be adjusted using the regulator because the effective spring length can be modified.  My question is: Does the hairspring bounce off and touch one of the pins as it breathes? Is that why the effective hairspring length is adjusted by moving the regulator?  And follow-up: How is amplitude affected by the spring between the pins? Does fully open pins, dial up position = max amplitude?  When spring adjusted to 1/2 width still = max amplitude? When I have crown down gravity is pulling the spring against one of the pins and I would expect rate to go up and amplitude to go down. Is that correct?
    • A quick Google for Longines 25.17 found several similar watches - like this one with writing on the case back similar to yours https://benjaminmarcello.nl/product/longines-cal-25-17-tank-from-1938/
    • Apps like Watch Accuracy Meter can be inaccurate, and will read some watches better than others.  What daily rate does Watch Accuracy Meter give you if you check the Longines once it’s been running for 24 hours? Best Regards, Mark
    • Then, can I replace it by purchasing a regular ruby with the same or similar width and height and pivot groove size from eBay? If I replace it like the above and operate the movement, will there be no problem?
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