For Sale is a 1st Quality Royal Copenhagen Blue Fluted Plain Covered Sugar Bowl marked 1/428 with a bar under the N of Copenhagen on both pieces.  This suggests that both pieces were created between 1979 and 1983..

Both pieces are in excellent condition with NO chips, cracks, crazing or other obvious defects.  Being over 40 years old they may have light scuffs, scratches or rubs that can be found with a close inspection.

I measured the bowl at 3 1/2" in diameter at the rim, 2 3/8" high and 5 21/4" across the handles. The lid at 3 1/2" in diameter and 1 3/4" high and both pieces together at 4" high.