The Sèvres porcelain factory was established in the mid 18th century. From the first Louis XV and Madame de Pompadour took an interest in the business and more particularly, in their output.
If you are interested in learning a bit more about Sèvres porcelain, I found quite a good article in the Auction Central News here. There are some nice photos of a range of Sèvres attached to the article.
Note that I resisted the temptation to call this post Deux Sevres Vases, on the grounds that it would be too confusing. The département of Deux-Sevres is so called because it lies between two rivers called the Sevres and has nothing to do with the porcelain.