I couldn't find any markings on the back of any of the plates... some seem quite worn. I did notice that the paint, on some plates, is raised, rather than completely smooth. I do find it odd, that there is no marking on any of the dishes.
This is export porcelain, and most export porcelain was never marked. Marks were only required from the 1880s for the American market, due to a requirement by the US government. So, anything that was made earlier or for another target area would remain without marks. If the surface is not smooth, it means that it was handpainted, possibly in the 19th century or early 20th century. But, please be aware that there were also made some in the second half of the 20th century. Without looking at details it could be from anytime within that range.
Apr 24, 2011
china by: peter
Hello, Pictures are too small to see any details, but looks as if it were Chinese 'Famillie Rose' export porcelain. Would need closeups and bottom pictures of single items to make sure if they are antique or new.