Vintage White Independence Ironstone Castleton Japan Nikko 3 Cups 4 Saucers Lot

Vintage set of white Ironstone. 2 cups and 4 saucers are Independence Ironstone by Castleton China, Inc., & 1 cup marked Nikko (see photos). All in great condition. No crazing. One saucer has small chip on underside edge as shown in photo.