Royal Crown Derby Pattern 2451 Traditional Imari 10 5/8 Inch Dinner Plate Circa 1968 Nice bone china dinner plate. Decorated in the Traditional Imari pattern 2451. Marked on the reverse Derby China Royal Crown Derby English Bone China 2451 XXXI. XXXI is a date code for 1968. Has some wear to the gilding, but otherwise good condition. Measures approximately 10 5/8 inches wide. This is vintage and may have small in manufacture defects that do not affect the display of the piece.