Is this patina on my dial or damage?

[sportsfan0704]

Just picked up an early 90s bluesey in what seemed like mint condition. Sharp bezel, original insert, strong crown on clasp, etc. however I noticed what looked like a hair on the dial so I had the watchmaker open it up and look. It’s not a hair and the watchmaker said it upon inspection with loupe and open it looks like the beginning of patina rather than damage. Is it possible for it to start like this and spot?

It doesn’t look like drag on the hands or anything like that. And if you move the watch around in light you don’t see it, which also leads me to believe it’s not a scratch. The watch is in otherwise such good condition with original hands that it seems unlikely that something bad happened. Insight is appreciated. Thanks!


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