This is a simple style pot de creme cup in the style that was made in the Tournai factory in Belgium. The decoration is rather thick dark blue pattern on an off-white porcelain cup similar to those designed for Louis Philippe. The finial is the tall Empire style, solid white.
The cup is about 10cm tall including the final. There is not mark on the bottom of the cup. It is estimated to be from the late 1800's.