In 1967 Pyrex debuted its Hearth Group product line. Brittany Blue and Federal Eagle were the two patterns released on the new line of products, which also included new Pyrex ware shapes.
New shapes included the 2 ½ quart casserole (485) with a 9 ½ inch lid, the 1 ½ quart casserole (483) with a 7 ¾ inch lid, a 9 oz. mug (489), the 1 ½ quart mixing bowl (478), and the 3 quart mixing bowl (479).
Both casserole lids could be used as quiche dishes and were referred to as a shallow baking dish. Of the two Hearth Group patterns Brittany Blue was the only one printed on casserole dishes.
Two different mug patterns exist under the Brittany Blue pattern. One mug is comprised of a light blue background with a large blue allover flower design and the other mug has a blue background with a white leaf patterned band circling the bottom.