Vintage Japanese Child’s Tea Plates, Vintage buy Toy, Made in Japan

This is a uniques set of miniature plates, still in their original box, made in Japan. The box says ‘Beverly' in pencil on the top and was apparently a cherished toy because they are well preserved, don't even look used. I was able to gently remove one to see the marking on the back but the rest are firmly secured in the package. The box has some light vintage wear and measures
7 1/4” x 4 3/4” x 1 1/4”. The dishes range from 1.5”-2” and are about a 1/2” in height.