2012 Two Coin Uncirculated Year Set-Fields of Gold, Wheat, featuring One Dollar Fields of Gold design Uncirculated coin and Twenty Cent Australian Wheat design Uncirculated Coin, Mintage: No more than 20,000. Weight: $1 = 9.0 gr, 20c = 11.3 gr, Diameter: $1: 25.00 mm, 20c: 28.52 mm, Metal: $1: Aluminium Bronze, 20c: Cupro Nickel Please contact Adelaide Exchange Jewellers to find out more on this item.