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Showing results for tags 'part number'.
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Hi all, so I have a JLC k480/cow that was running strong for a while. 270 amplitude and +/-5 seconds a day. I noticed one day losing minutes every hour, but it continued to run strong on Timegrapher. I assumed it was a loose canon pinion so i tightened it. And the watch continued to keep time well for the day. Then I go to case it to finish up and the amplitude starts to drop in all positions but dial down (even dial down amplitude now is 230-240). And I don’t know where to go. I didn’t change or adjust anything jus the canon pinion. I tried reoiling capstones it helped a lot but still not running as strong. I had to replace the escape wheel in the original service a while back. And when I went to check for parts today I noticed there are two different escape wheels listed wondering if anyone could clarify that. And further instruct me on how to resolve this issue 1109_JLC 480.pdf
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I have an ETA 2750 movement and I need to replace the mainspring. My catalogs don't cover this caliber. The current mainspring, based on my measurements has the dimensions Dennison (Metric), W: 5 1/2 (1.45 mm), T: 9 (0.13 mm), L: ~ 14 1/2" (368 mm). However, due to its age and the fact that it's been serviced before I'm not completely sure the old spring is the correct one. So my first question is are these the right dimensions for the proper mainspring for the 2750? My second question is does anybody know some part or catalog numbers for the correct mainspring by some different manufactures of springs, such as Marco, Nu Vigor, Sandsteel, etc.? I have some cabinets of mainsprings from which I might be able to get one but I need to know the a catalog/part number--some number I can cross reference to what I have. Hope this makes sense. Thanks.
