Persian handpainted porcelain and sterling silver Antique Art Nouveau ring

A ring from 1930s Persia.

The ring is unmarked IR guaranteed sterling silver, the ring has a band of silver that is plain with the centre being a bouquet of eight filigree flowers which is done by hand, at the centre of the bouquet is a cabochon bead of handpainted ceramic/porcelain done to an Islamic tapestry style with red, white and blue.
 
The piece is not new, this is antique and has been worn and enjoyed by many precious owners so please know two things, firstly, the piece is adjustable as the band is not solid, as it is, it is a UK N, the second, the porcalain cabochon is slightly rattly, it is not a risk that it will come out but I want the buyer to know this nonetheless so that a buyer is not unhappy.