Two 063 oval divided casseroles. Can you spot the difference between them? The bottom one is older. This dish originally had no "crease" across the bottom, and was not marked with a model number. Neither was the 053 open baker, ostensibly allowing the same bottom mold half to be used for both. Other than saving a small amount of glass, the addition of the indentation appears to serve no practical purpose.
Thank you for posting this information. I have two Pink Daisy Divided Casserole dishes. One has the crease on the bottom, and the other does not. I have always wondered why the differences. Thanks for the clarification, I appreciate you doing so.