We really need pictures to go on, can you post a few? There's a guide on vintage posting here: http://omegaforums.net/threads/vintage-omega-posting-guide.383/
The serial number dates it to around 1952, and the movement is manual wind is all we can tell you from the details you've given but pics tell much more of the story.
Ok, looks like a 14K solid gold, manual winding Calibre 266 movement watch from about 1952, whether its all kosher or not and whether or not the dial is original is a call I'll leave for someone better versed in such matters.
Pretty cool. Lettering matching the color of the hands and markers is a good indication it's authentic.