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Old 11 June 2019, 01:04 AM   #26
chunkythebulldog
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Join Date: Sep 2017
Location: Northern Monkey
Posts: 463
Stainless Steel doesn't rust.

What it looks like to me is cross contamination from a metal that rusts ie, mild steel. All it takes is for a tiny steel particle to land on your watch and that rusts which will then lead to discolouration of the St St.
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