2001 Centenary of Federation, State Proof Three Coin Set, New South Wales. Aboriginal tribal government existed for tens of thousands of years in the 'great southern land', but government as we know it today has flowed from the social and political progress since New South Wales was established as a British Crown colony in 1788. At one time New South Wales included what are now the states of Tasmania, Queensland, South Australia and Victoria or about two thirds of the land mass. The boundaries between the Australian colonies and states have since changed over a dozen times. In 1850, following local agitation for self-government, the British government passed the Australian Colonies Government Act. The colony of New South Wales achieved full self government in 1855. Certificate of Authenticity included with this set numbered 3948. Nominal Specifications, 20c Metal Cupro Nickel, Weight 11.30 grams, Diameter 28.52 mm. 50c Metal Cupro Nickel, Weight 15.55 grams, Diameter 31.51 mm. $1 Metal Aluminium Bronze, Weight 9.00 grams, Diameter 25.00 mm. Please contact Adelaide Exchange Jewellers to find out more on this item.