Antique Minton Oyster Plate Shells & Seaweed Pink & White 6 Well

Here is an antique oyster plate I believe to be made by Minton's in the 1870's. The plate is 9 3/8" in diameter and has 6 wells which are pink and white and a green center spot, there is a shell and seaweed pattern between the wells. There are no chips or cracks, just crazing and a ew popped glaze bubbles. The only mark on the back is an X.

Please ask more detailed questions!!