Vintage Large Metal Pressure Cooker

Vintage, maybe antique, cooking pot. Guessing it’s a pressure cooker, and it’s missing a lid . It could also be a canning pot - just not sure. It’s incredibly heavy, and it’s a very large, heavy item. It measures approximately 10 1/2” high and 18 1/2” wide (including handles). The diameter is approximately 14”. Guessing that it is made from galvanized steel, but not certain. Also, it appears to have an iron ring at the top (see pics). A piece of the ring sticks out - maybe that’s where a lid might attach. Weighs approximately 12 pounds. The condition is good - there are some spots of something on it.