Which model is this ?

Hi all,
my wife inherited from her mother ( who inherited from a cousin) a wristwatch.
We don't know much about Omega watches, so pease help us.
On the front it says OMEGA and Swiss made. The back is blank..
In the clasp thre is a "11" in a circle, a greek omega in a triangle and a "585" in a diamond/lozenge.
The there is a number: 711.8352 L.
Please see the pictures.
Does anybody know the model name, production date? Any hint is welcome.
Thanks and regards
Frank

585 stands for 14 karat gold. The watch itself probably doesn't have a dedicated name like Seamaster or de ville. It is a 14k omega watch.

Thanks to everyone who gave me his insights.
I very much appreciate this.
Regards
Frank