Thinking of selling a few of the watches I don't wear anymore. This one I don't have any idea of its value. It's an odd one, has the normal chronograph functions with date, but also has a 24hour GMT fourth dial that can be set separately. I believe that it is a Valjoux 7750 but not sure. Running and functioning but probably could use a service. Any idea of value with box and all paperwork including the chronometer certificate? I guess I'll keep things in one thread, another watch. Eterna Monterey GMT in nice condition with box etc.