Here are few watches that will suit your personality and will also solve the purpose.
While selecting keep in mind that you are candidate and not going to any college, so you should select ones which you can also wear in interview.
Do not select very funky, unless you have another one for interview occasion.
These are simple one's from Yep Me.
Other Brands - Rico Sordi, Timex, Dezine (Simple , Elegant , Fashionable + Affordable)