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By Neverenoughwatches · Posted
I can't say I've found it any better than naptha, why these chemicals specifically for hairsprings ? Just going slightly off topic, yesterday i was sorting out a very poorly balance assembly on a 90 year old AS554. All components of it in bad shape, first to deal with was a rusty hairspring. I did a write up a couple of years ago going through various kitchen items and their chemical make up in order of their aggressive nature on steel. The mildest being citric acid in particular lemon juice, so i thought i would try this first, anything stronger could eat through fragile thin steel very quickly. I used freshly squeezed juice heated on a wax melt heat plate to about 60° and soaked the hs for about 2 hours. Then lightly brushed and rinsed in IPA. The results were very good, the effects of the rust were still obvious but the iron oxide was completely removed. The pictures are the befores. -
Definetly one of these moments:
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By watchweasol · Posted
Hi. If the alternative is not available it is advise able to effect a repair on the faulty coil by the method you choose, it’s either that or the watch is scrap pending finding a working donor. -
Newbie here too, but I’ve done a bit of reading around this subject. Looks like a Breguet overcoil. You’re right about A and B - A is just a minor tweak - but most damage is between B and the stud. Pivots can be unbent, but there’s a high risk of breaking it off. Take care, and probably see how it runs before trying. That’s really dirty. I’ve never found IPA to loosen Shellac. If you’re worried, put it in soapy water in the ultrasonic and then dip it in IPA as a quick rinse to displace the water and prevent rusting. As for the stud - does it wedge in the angle and the screw holds it there?
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No, it is browser dependent - your browser may have a spell checker you can switch on in settings. A quick search on Google may help you if you don't use Chrome: https://support.google.com/chrome/answer/12027911?hl=en-GB
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