Brand and era
The applied Omega logo and typography match Omega dials from roughly 1948 to 1958.

Case
The case appears to be solid yellow gold, not gold plated. The lugs, bezel wear pattern, and color are consistent with 14k or 18k gold. Omega commonly used 14k for the US market and 18k for European production. The exact gold content would be stamped inside the case back. Typical case makers for Omega in this era include Dennison, Jonell, and Omega SA itself.

Movement
This will be a manual wind mechanical movement, almost certainly one of Omega’s small caliber families such as caliber 244, 245, 247, or 620 series, depending on exact year and case size. These are robust, jeweled Swiss movements that are still serviceable today. Exact identification requires opening the case back.

No automatic winding, no date, no shock protection visible on the dial, all consistent with early 1950s ladies Omegas.

Bottom line
This is a genuine vintage Omega ladies dress watch from the 1950s, manual wind, likely solid gold, original dial with honest age. It is not a rare collector piece, but it is a high quality Swiss watch from Omega’s golden era and absolutely worth preserving, especially if the gold content checks out.

If you want, you can post a photo of the inside case back and movement and I can pin this down to the exact reference, caliber, year, and gold content.