This is a cast iron miniature flush-toilet with tank. It is marked 'Detroit MI' on one side of the tank and what we think is 'Inwald Mfg. Co.' on the other side of the tank. We were unable to find anything out about this piece nor the maker. It stands 2 3/4" tall x 2" wide x 2 1/2" deep.
Pre-owned. The letters are difficult to read. Some scattered pits and rust are present.