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  1. cspinner

    Tool Lathe foot/mount and countershaft

    Hello, Seeking two items: 1. Large counter shaft 2. Looking for a lathe foot for a Geneva style 8mm boley lathe that appears to be from a flume F35. I have attached photos for reference. I have more modern options, but I’m on the hunt for something from that same era. one of the attachments is...
  2. cspinner

    Repivot Tapered shank for center drilling in lathe

    I came across another thread on this forum discussing the alternative of making a new arbor rather than repivoting the existing one. The one I have appears to be friction fit and perhaps that approach will be easier. However, I would like to attempt the repivot as I’ve been eager to learn...
  3. cspinner

    Repivot Tapered shank for center drilling in lathe

    All great advice. Much appreciated. I do have the tailstock attachment with the graduated center holes for the arbor mounted in the headstock. I also verified alignment (as good as I can see from the razor blade test) that the lathe is capable of center hole drilling. One difference of my plan...
  4. cspinner

    Repivot Tapered shank for center drilling in lathe

    I would like to use the repivoting attachments in my lathe to center drill a hole to accept the new pivot. See attached reference diagram for what I plan to do. I have to repivot a pallet fork arbor with a <0.15mm pivot that I cannot find a replacement for. However, I am missing a suitable...
  5. cspinner

    Mainspring strength questions

    SOLVED!!!! I got a donor movement and compared Hairspring, mainsprings, pallet fork, etc. As it turns out this little double wheel that drives the sweep second pinion and the rest of the train is designed to contain a bit of friction between the wheels. In my movement, the double wheels spin...
  6. cspinner

    Mainspring strength questions

    I’m out of town this week for work but hoping to pick this back up soon as I return.
  7. cspinner

    Mainspring strength questions

    Beat looks fine- impulse jewel is pretty much centered in line with the fork arbor. here are the videos above on YouTube:
  8. cspinner

    Mainspring strength questions

    Yes I do. Same technique I've used for many other watches. If the impulse was on the wrong side of the fork it would be overbanked and not run at all. Or are you referring to something else? The watch is running in the videos I've posted.
  9. cspinner

    Mainspring strength questions

    I have additional data after trying more troubleshooting steps tonight. Well, first it took me a good hour to reinstall the impulse jewel. Once that was done, I stripped, cleaned and regreased the mainspring barrel wall. Then with the barrel reinstalled I placed a mark on the barrel lid and...
  10. cspinner

    Mainspring strength questions

    Thanks for that clarification. I always thought the grease was to provide a way for the spring to "slide" around the barrel at full wind while the automatic rotor continues to do its thing, but grippy enough NOT to slip during normal operation or when winding up. Based on what you're saying, it...
  11. cspinner

    Mainspring strength questions

    Sounds like that's what I'll need to do. By "next weaker", do you mean dropping from a 10 dennison (0.11mm) to an 11 (0.10mm)? Of course my luck ran out. As I continued to troubleshoot, the impulse jewel eventually fell off. Fortunately, I didn't lose or break it - so I'm only out the time to...
  12. cspinner

    Mainspring strength questions

    Yes, it is a two piece automatic mainspring. The bridle is wound into the barrel and the tail of the spring catches the notch in the bridle. I should note that the watch was working consistently (though losing 4-5 minutes per day, and low amplitude) before I started the service. The automatic...
  13. cspinner

    Mainspring strength questions

    Yes, I mic’d it in a few places and it’s definitely 0.11 mm. What’s confusing is my width measurement of 1.42mm is larger than what’s posted on Ranfft, but according to this photo of a NOS spring, it’s still 0.03mm smaller than it possibly should be.
  14. cspinner

    Mainspring strength questions

    There was a slow motion aspect to it that got removed on the forum uploader. Here it is on YouTube. If you look carefully, the balance wheel is swinging all the way 360 degrees in both directions and slamming against the fork with tremendous force each way. I’m at a loss what it could be if...
  15. cspinner

    Mainspring strength questions

    How much strength does an additional 0.02mm of height add to a spring? I have a Felsa 690 bidynator that is overbanking like crazy (see attached). I pulled the mainspring and it appears to be white alloy. Width is 0.11 mm (per spec posted on Ranfft), but the height was 1.42mm (compared to spec...
  16. cspinner

    Fusee case hallmark identification

    If it were fake that would explain the great deal I got on it…
  17. cspinner

    Fusee case hallmark identification

    Looking at the letters a bit closer, it does seem like the mark looks more like a London D than a Birmingham Y. The lines in the center of the D and the piece on the left seem to be more similar. The “tail” that would make up a lower part of the Y seems incomplete. Hoping to find a sponsor mark...
  18. cspinner

    Fusee case hallmark identification

    It’s still in the mail. Hopefully there’s a hallmark somewhere not pictured here and we can solve this mystery. To be continued.
  19. cspinner

    Fusee case hallmark identification

    Complete set of photos attached.
  20. cspinner

    Fusee case hallmark identification

    Picture of the movement to help. It doesn't look like it's from 1839 though. Not sure if I'm wrong on the date letter or if the case and movement aren't original to each other.
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