I was chatting with a fellow collector who asked to purchase something from me. We were getting towards the end of the conversation when she said "look what I found today". I told her that was one of the things on my wishlist for sometime now. Instead of her doing a purchase we did a trade. Both of us were very happy!
Here is some information from the Corelle Corner site, an excellent source on Pyrex.
A new variation on this pattern became available on a third 475 casserole during the mid 1960s. With a plain opal background, the decoration is printed in black rather than gold, and the in-between bits of the design are absent. It uses a different candle-warmer too, the same one that belongs to the Zodiac Casserole.
The black & white version could be purchased from direct-selling catalogue companies like Popular Club Plan. Its original box has no name on it at all, so it might not be officially named "Gourmet Casserole".
You can read more here: