1988: Five Dollar Proof Coin - Australia's Bicentenary

Description
1988: Five Dollar Proof Coin - Australia's Bicentenary
To celebrate the opening of the Parliament House in 1988, the Royal Australian Mint struck Australia's first 5 dollar coin.
The reverse of this aluminium/bronze proof coin features the outstanding architectural achievement of the new Parliament House, designed by Mitchell/Giurgola and Thorp.
This proof coin is presented in an box of issue with a Certificate of Authenticity.