The Revell/Italaerei C.R.D.A. Cant Z. 501 "Gabbiano". This is an older kit; I couldn't find a date on it. The Gabbiano was obsolete as a submarine patrol aircraft by 1941 and was replaced by the 506, but it served throughout the war in air-sea rescue. It was affectionately nicknamed "Mamma, aiuto!", which means roughly "Momma, HELP!".
Significantly smaller than a Catalina, it's a little "pocket seaplane". Photographed June 2009 .