Copeland Spode England Shallow Bowls, 2 sizes

Pretty floral pattern, the shape is sort of a rounded off rectangle/stretched octagon. On the bottom are markings that include the Copeland Spode England, followed by what appears to be Rd ... 512488. This is printed on the bottom of both. Molded into the bottom of the smaller one is what appears to be Y, with 08 below it, and a 6 nearby. On the larger one it is a T with 08 below it, and nearby a 12. Any idea of the age or value of these plates?