This is a first generation cast aluminum Magnalite by Wagner Ware 5 quart dutch oven or round roaster with lid. Magnalite was introduced in 1934, and by around 1940 the marks on the bottoms of their cookware changed slightly - the primitive, shaky cursive Magnalite mark in the center was enlarged and straightened. The pot measures 10" diameter (not including the handles) by 4-1/4" deep. It's really clean for being about 90 years old but there is some shallow pitting and mild discoloration inside as shown.