Old Omega 18k pocket watch

It's a nice watch and it certainly has value, not just from the gold content.
The style is known as a "Demi-Savonette" which is the same as a "half hunter" that is the English term.
Savonette is the French term, meaning "Soap" due the shape of the case and the position of the stem/crown etc.
It's a Hunter case (with a closing front lid) with a window so the hands can be seen with the case closed.
I think the hands may be later replacements, they are usually styled so that the difference between the hour and minute hands is evident with the case closed.

If you can provide photos of the movement and the inside of the inner back cover we can give you some more info.

I would say the style is from the early 20th century (1910 to 1930?)