Helvetia 80C Barrel Arbor Reverse Threaded, Why?
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I'm a newb who is a bit late to the party here. I've purchased a Horia movement holder clone. And I'm aware that the support pins for the SW500 chronograph jewels can be different sizes. I purchased 0.8mm pins with the holder. These were all that were available at the time. Will these be the right size? Can someone shed a little light on this for me please? -
That looks fantastic! I'm obviously a little late to the party here. Can you tell me where you sourced the case that you used in this build?
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If pivot shoulder almost touches the mainplate, you will see lower amplitude and free oscilation comes to stop quicker. Such touching can stop the watch. This caliber is based on FHF, I think. So some parts of a cheaper movement of same caliber might interchange. Both observation point to pivot worn short, which support you suspect , "worn pivot". The problem with pivots wear to this point is , though the watch runs, pivots can easily jump out of jewel holes in the event of shock, pivots are actually not touching the end stones. Classic watch repair recommends staff replacement or elongating pivots. Non classic let's you flip the end stones to have the dome side of end stone facing the pivot end, this will somewhat or wholly compensate for the wear. Regs -
This watch has a pin end mainspring. It's a blued steel spring and may be the original >100 year old part. As you can see, it is quite set. Can anyone suggest where I might be able to obtain such a spring today? Dimensions: Height: 140 Thickness: 010 Arbor diameter: 340 Barrel diameter 989 (1/100 mm) -
Many thanks for your answers: 1. I will clean both of them without risk 🙂 2. Both of the rotate inside their setting but they don't seem to come out. I will clean the cock (and the hole jewels) and I will see if they want to go out. I don't intend to force the setting pushing it out by any means. I only hope I don't need the dismantle the whole cock into all its components...! 3. I won't touch it. Only clean. I don't want to take risk... Thanks again! Thanks for your anwer. Yes, I meant short. In fact there are 2 pictures where It can be seen that the balance almost touch the main plate. The balance only spin freely when I loosen the cock screw and also the bottom jewel setting. I cleaned the exterior jewels on the cock and on the main plate. But I can't take the interior settings. I uploaded 1 picture on this My reply to your comments are below. Apologies as I Replied rather than quote...
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