Is This seamaster 300 a red flag? Also is this a 2531.80?

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Hello guys,
Can you please help me ?
Is this original? And do you know if the mode 2531.80 is represented here or is another one with a change of bezel?
Thank you all for helping.

 
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Thank you very much...
I thought so too, but after my last mistakes I am starting losing trust to my self.
were there models exactly like this one, but with a silver bezel?