Antique Adderleys "Chelsea" Small Platter

19th-c English smooth, small white porcelain serving platter by Adderleys Staffordshire, with eight raised/embossed purple grape leafs. Note that official pattern name, however, calls it 'blue.' Two teeny-tiny nicks on outer edge; cannot be seen, only felt. This size is hard-to-find; I found at London flea market. It is rare...and lovely! Length= 8.75" Width- 6.75” Height: ½”