Omega Geneve authenticity

Hi all, Im starting out with my collection, and this is a must have type.
I came across a seemingly good deal,but having second thoughts, and wanted to make sure it is authentic, so that I van move forward with the purchase.

Please help me confirm its Geneve.
These are the pics I got so far, but Im asking for some more too. How does it look based on these to you?

I greatly appreciate the help!