Omega constellation seems like a iffy jeweler. I went and checked out the website and it does not seem to have any trusted programs on there. If I were you I'd avoid it.
There is an official Omega website that has information on Omega constellation jewelry. The website is [ http://www.omegawatches.com/gents/constellation/jeweler ].
Most major jewelry stores can replace the battery for you including Jarrod's. I would look for a reputable jeweler one in your area and look for reviews of that jeweler first.
Top Jewelers, Authentic Watches, and Omega Constellation's website are some of the online stores where Omega Constellation watches can be found online.
To remove links on an Omega Constellation watch, you will need a watch pin removal tool or take it to a professional watchmaker. Carefully push out the pins holding the links in place until the desired number of links are removed. Be cautious not to scratch or damage the watch bracelet during the process.
I think the Constellation Baguette Priced priced at $708K US.
At the website for omega constellation watches (http://www.omegawatches.com/gents/constellation/) you can buy them online. You can also use the store locator at the top of that site to find a place to buy one near you.
Omega have their own website which specializes in the sale of all brands of watches. Alternatively there are deals available across the web for the constellation brand.
The best time to view the Omega constellation in North America is in the summer, specifically August. Other constellations that can be seen during this time are the Lagoon and the Trifid.
Omegawatches.com is the first place I would look. If you can find a reliable seller on eBay it would be another good site to try. I believe amazon.com also sells watches.
Reliable information for an Opel Omega can be found at the official Opel website. They have a comprehensive database regarding all their released models.
To sell it at the local jeweler who buys it, not in the mail.
A well known jeweler is indeed Breitling chronomat. They have a great reputation and is always at the top of the list of ranked retailers. I would recommend them.