Paris Porcelain Litron Cup & Saucer Empire Halley Dagoty

This is a beautiful Paris Porcelain Litron shaped cup and saucer dating to the empire era. The cup is skilfully hand painted in monotones upon a peachy brown ground with a gilded patterned band at the top of the cup and a gilded foot rim and handle. Apart from an impressed circular turning mark to the underside, both pieces are unmarked however, the style of the cup and decoration leads me to believe that the duo was made by either Dagoty, Charles Halley or Henri Florentin Chanou.