An old Paris teapot

The teapot was bought several years ago; I was amused because of the imperfections of the shape and the thik but translucent paste. It has a rectangular shape with chamfered corners. Gentle s-curve spout, scroll handle. It is marked on the bottom what seems a two II in roman cyphers. Then I understood it was much older of what I thought and use it seldom, it is very comfortable since it is for a large number of cups.
There are several examples on line of this type of tea pot, they are dated between 1850-1870
http://www.ebay.co.uk/itm/Old-Paris-Porcelain-Second-Empire-Octagonal-Teapot-c1850-1870-/161729343785
http://imelda-vintage.fr/achat/produit_details.php?id=12
http://www.moinat.co/fr/porcelaine-faience/9676-service-a-the-en-porcelaine-vieux-paris-2-tasses-1-theiere-1-sucrier.html

The paste is Limoges before 1891, thus it is not marked, and done to be decorated by many of the small decorators in Paris at that time, this model is call "boite" box and was very popular during all 1800.

I have published another one http://www.collectorsweekly.com/stories/132570-an-vieux-paris-veulliese-a-victoria-fren