This is a very nice covered casserole distributed by Gailstyn-Sutton in 1982 (a Towle Company), and manufactured in Japan . The pattern is Copenhagen.
This dish has a white background with bright blue flowers sprinkled all over it. It is in excellent, used condition, and comes with the original box. It can be used in both a microwave / conventional oven.
Take a look at the pictures, and if you have any questions, please e-mail.