As stated in another article earlier (see below) a FIUME passport is something pretty rare. I was recently offered one but the seller wanted way too much for it. I was ready to pay a fair price but his price suggestion was out of discussion. However here are the pictures. Enjoy.
The Free State of Fiume was an independent free state which existed between 1920 and 1924. Its territory of 28 km2 (11 sq mi) comprised the city of Fiume (now in Croatia and, since the end of World War II, known as Rijeka) and rural areas to its north, with a corridor to its west connecting it to Italy.