3861 bracelet mystery defect

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Yes, these marks were present when I bought the watch (although I didn't notice them at first as I was in a state of high excitement about my purchase) - see attached photos which I took on the day. As I said previously, they started as faint brown 'burn marks' and solidified over time into much more pronounced lines, evenly placed at the edges of the outside links.

Interesting to read that @EuroDriver has seen this on high-end knives, and @hen's theory that it might be something to do with heat in the production process seems very plausible... I'm going to email Omega this afternoon to request an update on their investigations and will let you all know if I hear anything (although I'm not holding my breath).



This sparked a memory for me: what @EuroDriver mentions, I have also seen this before but I hadn't really thought about it much. I had a shun 9" chef that seemed to develop a line exactly like this in color near the bolster, at a 45° angle to the handle. It was a lot less visible than this, but a definite gray line. No idea what caused it, although I wondered if I had left the knife in the sink at an angle overnight? Wouldn't have explained how isolated the mark was though and it is possible that it was always there, it was faint enough that I might not have noticed it. Cleaning it did not do anything to get rid of it.
 
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I am having the same issue on my Speedmaster purchased in July. Rusting on two links (not as bad as yours but I caught it early). Sent it back within the first week of ownership for warranty work. Omega is denying it is their issue. Any suggestions on how to deal with this? I would very much appreciate it


Spinny, Welcome to the forum. Sorry to hear that you were having this issue, do you happen to have any pictures? I have heard that Omega uses a stainless steel slightly more scratch resistant and slightly less chemically resistant, but to hear that a stainless steel bracelet from Omega is rusting in 2023 is fairly surprising. Sorry you're dealing with this.
 
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Spinny, Welcome to the forum. Sorry to hear that you were having this issue, do you happen to have any pictures? I have heard that Omega uses a stainless steel slightly more scratch resistant and slightly less chemically resistant, but to hear that a stainless steel bracelet from Omega is rusting in 2023 is fairly surprising. Sorry you're dealing with this.
Thank you Erich for the quick reply and welcome to the community! Photos are attached. You can see the slight tarnishing in the second and third links from the case.
 
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As I posted in the other thread, if the discoloration appears slowly, it could be iron contamination of the stainless surface that is slowly oxidizing (the iron, not the stainless). The contamination could be from polishing or brushing (and more polishing or brushing could move the iron around, instead of removing it), or from water containing too much iron, or from dirt containing iron dust (e.g. metalworking dust blowing around).