1,000 won: Yeosu EXPO 2012 - Official mascots

Image of 1000 won coin Yeosu EXPO 2012 - Official mascots | South Korea 2012.  The Bimetal: CuNi, nordic gold coin is of UNC quality.
External rim: copper 75%, zinc 21%, nickel 4%
Internal rim: copper 75%, nickel 25%
Center: copper 65%, zinc 35%