Recently inherited this watch from my grandfather, would like to know the exact model, and its approximate value. Is in excellent condition, in its original box with original band also.

 

Well your watch is obviously a De Ville, but Omega went even further and applied "lines" to the De Ville collection such as the "Emerald' line, "Mille et Une Nuits", "Vincennes", "Rivoli" etc.

To find out exactly what you have, follow this guide (ignore the first part about fakes):

https://omegaforums.net/threads/how-do-i-identify-my-vintage-omega-watch.93146/

Let's know how to go.

Cheers

Jim