From a layman's POV, it looks promising for authentic. I'm noticing that this is not your basic style of watch with the unusually shaped case, ribbed ball stem, quick change pins for the leather straps, and the pave' face, bezel and lugs. Can't tell how the diamonds are set, but they do look even, and they have color. Another good sign.
Is there an authentic watch dealer online whose photos you can compare it to?