Here is information on your watch:
http://naligazone.com/index.php/data-watch/omega/13-watch/omega/193
20 micron gold plate is one of the options. Looks all original to me, but DON is right. The case is shot.
Watch doesn't have a great value. The work needed to recondition the movement and case would be more than the value of the watch in good condition.
gatorcpa
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