Vintage Dru dutch oven (actually Dutch, since this is marked Made in Holland), heavy cast iron with colored enamel finish inside and out, like a le Creuset pan. This holds about four quarts, and measures 10" x 4" in the pan area, the underside is stamped 26.
This has been used, and shows some scratching, discoloration and wear. The enamel looks fairly solid, and this should be fine for use yet. The butter yellow color is pretty, and works well with either the delft blue or jadite green colored sets!