This is another pretty pot de creme cup, hand painted by Delvaux porcelain in Paris, France. The yellow background color is vibrant with contrasting stylized green leaves and red-orange flowers.
These cups were typically sold in sets with a matching tray. You can see an example of the same blank pot de creme cup painted with little pink roses here.
The cups have two handles which, as we've mentioned before are less popular in the U.S. but very common in Europe. This design has a very pretty rose bud finial with very fine detail.
The cup is marked on the bottom:
18 Rue Royale