2001 Centenary of Federation, State Proof Three Coin Set, South Australia. The province of South Australia was founded in 1836. It's history is unique. Unlike other Australian colonies, South Australia had no convicts and its free settlement was planned. Its founding Act incorporated important political and social freedoms, including religious freedom. It was given a promise of self government from the outset that was realised in 1856. These factors gave South Australia a commitment to democracy and a strong sense that they were different from the other colonies. This was an important influence that was reflected in its approach to Federation. Certificate of Authenticity is included with this set numbered 3371. Nominal Specifications 20 cent Metal Cupro Nickel, Weight 11.30 grams, Diameter 28.52 mm. 50 cent 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.