Red Slag SATIN Butter Dish which was made by Imperial Glass from 1971 - 1976. It is their #759 Box & Cover which is marked with the IG for Imperial and also has the original Imperial sticker which states S 759 Box/Cover R/Slag. The color on this one is wonderful. It is 6 1/2" across and is in wonderful condition. I can find no damage.
Rare Milk Glass Covered Animal Dishes, Slag Glass, EAPG Animal Covered Dishes
1880's Milk Glass & EAPG Covered Animal Dishes, Slag Glass, Powder Jars w/Animal & Human Figures from Depression.