Hello,
First, you have to read By-Tor's guide to get some info about Omega watches and your model. Second, the watch you're looking for on your link is very bad: Bad CG's, bad pearl, HE valve is to big. If you are looking for a good quality watch by only swiss version.
Finally, if you are in UK, you can buy to UK dealers like PT (www.ptswiss.com) for example.
J.Bd