18th-century Earthenware Plate With Chinese-style Decoration

Chinese-style decorations were standard on mid-18th-century faience.
Although very common in Moustiers, it seems, however, that this dish comes from another production center. 
Indeed, the darker clay and the very pretty, slightly pale blue decoration—painted with skill, though perhaps with a touch more simplicity than in Provence—give cause for speculation.
Is it a product of the Lyon workshops, I thanks a a well inform friend who think Roanne . 
I would be grateful to anyone who can help me determine the origin of this lovely earthenware piece, which is in perfect condition.