Country Italy Denomination 500 lire Year 1978-1998 Name 20 years of IFAD Period Italian Republic (1946 - 2001) Minting type Commemorative coins Material Bi-metal: center - bronze, ring - akmonital Edge Ribbed with smooth areas Shape Circle Ratio abs/roar Coin (180°) Weight (g) 6.8 Diameter (mm) 25.8 Thickness (mm) 1.8