Need some help with this Omega Seamaster DeVille

[JPersat]

Hey guys and gals, I inherited this watch from my Great Uncle. I know the case is gold due to the expandable bracelet wore part of it down, but it doesn't have the typical Seamaster logo on the back. I know he had the watch for a very long time. It still runs, but it sounds like the rotors needs to be tightened and it needs a new crown and stem. Any information would be greatly appreciated.