How to Authenticate the Vintage of Corning Ware Blue Cornflower Casserole Dishes. 1961 – 1966: Single Graphic of Flame Logo on Top. First Line Reads “CORNING WARE”. Second Line shows the Capacity (1 QT) and the Style Designation (P-1-B). Third Line Reads MADE IN U. ” No additional print is below the “MADE IN U. 1966 – 1969: The Cornflower image was added underneath the Capacity & Style Line. If a piece has this Second Image, it is not from the 1961 – 1966 Vintage. The 1961 – 1966 Vintage only had the Stylized Fire Logo at the very Top. 1969 – 1972: The words “FOR RANGE & MICROWAVE” were added as the bottom line of Text. The Rare 1961 – 1966 Vintage did not contain a Second Graphic Image in the Maker’s Mark. It only had the Flame Graphic at the very top. Items that contain a Second Image or contain the words “FOR RANGE & MICROWAVE” are NOT Vintage 1961 – 1966. The Casserole Dish itself is beautiful example of 1961 – 1966. There are no cracks or chips. The Color is Bright White. There are very minimal usage marks around the perimeter of the underside of the Casserole Dish. Even with these Extreme Close Up photos the item shows very minimal visible signs of usage. The Lid is in Good Condition but has a chip as shown in picture. The Glass Lid is denoted as D-1 on the outer Rim. Images show the Exact items for sale. We do not use “Stock” photos in our listings. We wrap items very carefully to ensure safe transit to your door. Serious Offers Only, Please. Thank you for viewing this listing!