Vieux Paris Blue and Red pot de creme set including 6 pot de creme cups with matching tray. Although the seller erroneously described as Vieux Paris /Art Deco it is French from Paris. Vieux Paris is another term for Old Paris Porcelain which this set clearly is not. Old Paris was typically ornate with lots of gold trim and clearly this is not Art Deco. That all said it is a beautiful set with ornate hand painting.
The design is all hand painted in a striking blue and white pattern with red trim.The mark shows the cup was decorated at 970 Haussmann St, a famous area in Paris. We don't know for sure but it's more likely from the early to mid 20th century.