Originally developed for military applications in World War ll as ballistic missile nose cone material, Corning  Ware's Pyroceram also proved effective for bakeware in the home after the war. The glass-ceramic, non-porous material was capable of withstanding sudden temperature changes and was resistant to stains and odors. The same dish could be used for cooking, freezing and serving food, The lids are typically made of Pyrex tempered glass and the lids have a lower tolerance for thermal shock and cannot be used over or under direct heat. Casserole Dish was purchased at an Estate Sale. The hologram shows wear on this Vintage Le Romarin Corning Ware Casserole Dish and was produced 1972-1979 per the Corning Ware 411 blog. I can see everything fairly well and hopefully the pictures portray that. The hologram also read 9 3/4x9 3/4x2. Someone else has this same bowl listed for $3,999 and the major difference is their hologram stamp shows up better, fading of the holograms is very common on these older bowls, again refer to the 411 blog. Bottom of the dish shows some scuffs, there is a tiny manufacturing indention that is very smooth to the touch on one dish and a scratch on 2 of them on the outside of dish and minor ones on lid, see last photos.