Am I selling fake?

[coutet]

Ok so it's probably weird to be 'turning myself in' but I don't want to be the person that tricks someone into buying a fake item.

I bought these links at a good price. They didn't fit my seamaster 2531.80 so I thought I'd sell them on quickly.

Problem is these links are not tapered on the sides like my seamaster. In fact they're quite sharp.
So did omega change the strap or is something not genuine?

heres the link

eBay - The UK's Online Marketplace

[OGM]

It's seems fake to me... Look at the two small center links (the small one between the two shiny links), they seems too slim. And the center brushed link seems too wide.