This is a 10″ Heinrich (H & Co.) Christine Line, “Arcadia” porcelain dinner plate. According to the backstamp, this pattern was manufactured in the Selb, Bavaria, Germany, from 1930 to 1939.
I have six (6) of these dinner plates for sale, each one separately. They are all in very good, used condition.
Take a look at the pictures, and if you have questions, please e-mail.