This is a 2028 plate, though of the 10 1/8 inch variety. I have the exact amberina plate, shown here, in selenium red, signed with fleur de lis. The amberina plate is not marked, and has almost imperceptible ribbing and scalloped edge. The exact congruence in size (they nest perfectly) and identical color, would speak to the work of Carder. David Chadwick-Brown