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What I looked the microscope feed, the particles indeed looked like white ones. I just wonder where they got there. I doubt this movement has been submerged into the ocean :) Hopefully this is not cleaned with sea water..
The running graph in the timing machine was quite straight.
The seller had taken pictures from this watch caseback open. I wonder if the photo session has been in dusty environment?
I don't have very high faith in, how "well" the previous owner had this serviced before me.
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