Omega De Ville watches are their simple yet elegant collection. It is a vintage Swiss winding watch.
It is in great vintage condition with only a few scratches on the face. See a comparable here. https://www.1stdibs.com/jewelry/watches/wrist-watches/18kt-yellow-gold-omega-deville-ladies-watch-case-1970s-fully-serviced-warranty/id-j_13461042/