vintage Blue Willow pattern round vegetable serving bowl

Vintage Blue Willow pattern serving bowl, 8 1/2" in diameter x 2 1/2" deep. This is not marked with a maker's mark but is American made Royal China, we think? We think not made in Japan ware, since generally the dinnerware was stamped, rather than using paper labels.

This is in very nice condition, no chips or cracks, or utensil scratching from use, but does have slight glaze wear and roughness to the rim.