Hey everyone - Came across this watch on the ebay. I have never seen an omega with this style case (engraving or "securing ring"). Any of the experts have any more information on this ref? http://www.ebay.com/itm/VINTAGE-OME...304225?hash=item48894f0ba1:g:dngAAOSwvUlWs8LhPurchases made through these links may earn this site a commission from the eBay Partner Network I'm not too familiar with these Cal 30.x watches.