Omega Ladies De Ville, any ideas?

Omega did a series with similar appearance to the subject watch which was named “Sapphette”. One similarity between the subject watch and a Sapphette is the faceted synthetic sapphire (nor cut or faceted glass). In your picture, the case appears to have a stainless steel back which might imply that the case gold filled. A Sapphette model would have a karat gold case. As to value? Women’s watches are generally not highly sought after. Even Omegas. Whether the bracelet is karat gold or plated, would be a factor. Whether the case is gold filled or karat gold would be a factor. Any opinion of value offered here would be a matter of personal opinion. But, generally, if the case and bracelet are both karat gold, the watch should sell for more than scrap value. How much more depends on where it is offered for sale, and finding two willing buyers who want to fight over it. If gold filled, expect the price to be much lower.

An item can have intrinsic worth which can mean an item could have value to someone other than the owner. It can also have sentimental worth, primarily to the owner. The Omega is a pretty watch. The faceted synthetic sapphire makes it stand out. That might contribute to someone seeing intrinsic worth in the piece. The name may also count for something. But sentimental value doesn’t add a red cent to the intrinsic worth or the market value.