This is a 1970's Hamilton Dateline named because of the placement of the date which is inset into the case below the six itself rather than being part of the dial as with most watches. The other thing that's different with this watch is in the movement which features a micro rotor arm instead of the conventional rotor, this was created to keep the movement thin.
 
The case is Gold Plated with a steel back and is in very good condition, a few marks commensurate with its age but nothing major, the dial is clean and shows little signs of ageing.
 
Inside the case is a 17 Jewel Swiss Lever Automatic Movement with MicroRotor, marked Hamilton Watch Co  630
 
Cosmetically overall this is in very good condition and running very well.