2011 Australian Wool Two Coin Uncirculated Set. The arrival of the Merino sheep with the First Fleet in 1788 began one of Australia's most successful industries. After the first commercial wool export to England in 1811 it was often said that Australia 'rode on the sheep's back', as wool became the foundation of our burgeoning economy. These uncirculated coins capture a shearer hard at work and a wagon wheel illustrated with a series of images representing Australia's rich history of wool production. Coin metal, $1 Aluminium Bronze and 20c Cupro Nickel. Mintage no more than 40,000.