I trying the figure out what the correct case clamps for the ref. 2990 is. Cousins calls them 267 2990 but dont think it is the correct Omega number. Anyone that can help or maybe some clamp for another cal./ref. will fit? @Archer ? Is 2996 the same clamps? Thanks Thomas
No clamps are listed under the case references 2990 or 2996. There are two listed for Cal. 267, but both are obsolete and not available. Such is life dealing with vintage watches...
You might try contacting an eBay dealer like this one, who has scores of "obsolete" Omega case clamps in stock: https://www.ebay.com/str/Watches-Etc-Online?_trksid=p2047675.l2563
Or you could find a watchmaker who can simply fit clamps that work. Case clamps are not typically really critical items (except in a very few instances) so if it holds the movement in place, and doesn't get in the way, it's fine. On watches like these, they are nothing special, and I would expect most watchmakers have an assortment of case clamps and can find something to work, or modify an existing clamp to work. I've made them from scratch when needed - not a big deal.