This is a 1970s yellow Club Aluminum Cookware 1 quart sauce pot without a lid. The condition is good. It has normal oxidation that could be polished off with cleaners if you choose. These marks are normal and the pot is safe to use. These pots are retro today, but when introduced nearly 100 years ago, it was cutting edge. It also brought a new way of making and selling the aluminum pots and pans. Cooks also liked aluminum's similarity to silver. Cast aluminum featured excellent heat conductivity, and unlike cast iron, could come with wooden handles. About half of all cookware is still made with aluminum. At first, you couldn't buy Club Aluminum in shops. Club Aluminum began before Tupperware, Avon and Pampered Chef parties. Club Aluminum started in Chicago as the Club Aluminum Utensil Company in 1923. A 1925 Club Aluminum cookbook informed cooks of the company's new technology: "The first entire kitchen equipment of processed hardened aluminum, scientifically constructed with tight-fitting covers." Club Aluminum was also "scientifically constructed to last a lifetime," according to the book.