Sorry mate but they sent you a fake nato.
Check a difference between yours and ama98&mine straps. Thin red lines for example, yours are skew like stair, I do not believe Omega ever made CWZ006531 nato like that.
I see what you mean when you enlarge the pics but it was an omega dealership that ive bought watches off that put the strap on for me so as they didn't say anything but very nice strap I assumed it was genuine
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