Can someone please help me identify this tool?
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Hello All, I’m restoring an AS/ST 1686 movement. After service, the beat error is 2.0mS and I’d like to adjust it. The stud on this movement is fixed, so I’ll need to adjust the collet. I’m doing this as practice in the technique as much as anything. I’ve done it successfully before on a different movement, also with a fixed stud, but on that occasion I managed to fluke the direction I needed to turn the collet and reduced the beat error pretty much by accident. I didn’t learn how to determine in which direction the stud needs to be turned. On this current movement, the pallet fork looks pretty well centred between the banking pins to my eye, but clearly it’s not. What tips can folks give me to work out in which direction I’ll need to turn the collet once I’ve taken the balance out of the movement? I’ve read some suggestions on other forums but they left me confused rather than enlightened. Looking forward to learning what others do. With thanks, John -
Did you service it yourself and what mainspring did you use as this may also be a problem? -
Silvering is one of the few things I have actually done, with success. I followed the method described here: https://www.cousinsuk.com/PDF/products/8514_Silvering Clock Dials.pdf Essentially, I bought silver nitrate, dissolved it in water, precipitated it out by adding drops salt water (dissolve ordinary table salt in water and add until it stops turning cloudy when you add a drop). The white precipitate at the bottom is very fine silver chloride powder which can be filtered out and dried. Add cream of tartar which is available as a cooking ingredient and comes as a fine powder, which is soft anyway, and ordinary salt which needs to be crushed to dust. Ideally grind the three together as described in the link, using a pestle and mortar, but this can be improvised with an old teacup (try to avoid a mug as is harder to grind the material in the corners) and a suitable pebble to act as a pestle. I found it worked quickly and easily when taken up on a small piece of damp, lint-free paper and rubbed on. Alec -
yes it has a full service including a new mainspring, I am thinking the same, that again it is a faulty auto mechanism again. Its on the auto winder at the moment, its been on for 24 hours so I will see when and if it stops. If it does stop and there is no power in the barrel I am going to replace the auto mechanism again. -
So no problem as long as you understand what needs to be done. Very good! 👍 I started the disassembly yesterday. With a few exceptions the screws looked untouched so maybe the watch has never been serviced. I have the principle of treating all watches regardless of value and brand in the same way but hand on heart, I took extra time and was extra careful to dress my screwdrivers and tweezers. This level of quality is beyond anything I have experienced except possibly a couple of Omega movements. In general, it is easier to handle high-quality movements because all the parts fit together so perfectly, especially during assembly. Just screwing the case back on and off feels almost a little sensual. It almost makes you blush and look over your shoulder 😆 The fit is exceptionally precise! In the long run, maybe sometime in the fall, I plan to create a service walkthrough. Therefore, I take lots of pictures of which I may then use a third. If there is interest in taking a look at the status of the movement, you can click on the link below where I will gradually post the raw material. On Thursday, the family goes on vacation so the continuation first in the second half of August if all goes as planned. https://1drv.ms/f/s!AnVrKJ9agkNWkoFMtyD2O4kPIs66Jg?e=oMRKbn
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