There is no such thing as a Dunlop watch.
This is a "generic" model that can be customized with your company logo, maybe to be used as a corporate gift etc. You can probably find exactly the same watch with different "names" on it.
Nike and Adidas watches, on the other hand, are genuine items, built by some other company under contract, following the exact specifications that Nike and Adidas choose.
If you are not ready for an Omega, I would suggest that you check Casio and Citizen as a good starting point.