found this on that auction site... http://www.ebay.com/itm/VINTAGE-RARE-EARLY-OMEGA-SEAMASTER-300-REF-2913-1-NO-RESERVE-/171417236569Purchases made through these links may earn this site a commission from the eBay Partner Network ebay number 171417236569 the seller seems to sell a few Omega pieces but it's always a worry. Looks ok to my un-trained eyes. Look forward to forum input!
Case is worn as is the dial. Bezel as is usual needs to be redone. And I agree that the endlinks look like later replacements.
Yes we've looked at these dodgy ends from Alex on a different 2913 listing http://omegaforums.net/threads/over-under.13441/#post-152762