Welcome
@BenBig
As the others have said, you’ve found yourself a nice watch.
It’s a dome dial, dogleg lug Constellation, case reference 167.005 (no date version)
It is reasonably valuable and certainly worth servicing and keeping.
It needs a service as it’s showing signs of rotor rub and there the case gasket is missing.
A service will cost around £200 plus £50 for a crystal.
if you let us know where you are (country will do) you should get recommendations for a watchmaker.
Here is a link to a great site if you want to look into the history of Constellations
http://omega-constellation-collectors.blogspot.com/
hope that helps
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