From the outside it looks legit. Looks to be from late 1980's or early 1990's.
Omega made a lot of models. Most of the people on this forum are not familiar with Omega's offerings from this time period.
My suggestion would be to take it to an Omega Boutique near you and see if they have a watchmaker on staff who could open it up and give you some information about it.
If you do not have access to a boutique, then take it a watchmaker who can open it up safely. Take good quality photos and post them here
We'll do our best.
gatorcpa
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