The Australian 50 cent denomination was first introduced as a silver coin with decimalisation on 14 February 1966, but was changed in 1969 to its current specifications: a large dodecagonal (12-sided) copper-nickel coin; apart from the usual design featuring the Australian Coat of Arms, the denomination is also extensively used to issue circulating commemorative coins with various reverses. It is one of the heaviest coins in regular circulation in the world.
Apart from circulating coins, the Royal Australian Mint has a range of Non-Circulating Legal Tender (NCLT) 50 cent coins issued for collectors, such as this one.
This commemorative coin marks the 60th anniversary of the Bathurst 1000 car race.
The Bathurst 1000 (known for sponsorship reasons as the Repco Bathurst 1000) is a 1,000-kilometre touring car race held annually on the Mount Panorama Circuit in Bathurst, New South Wales, Australia. It is currently run as part of the Supercars Championship, the most recent incarnation of the Australian Touring Car Championship. In 1987 it was a round of the World Touring Car Championship.
The Bathurst 1000 is colloquially known as The Great Race among motorsport fans and media. The race originated with the 1960 Armstrong 500 at the Phillip Island Grand Prix Circuit; it was relocated to Bathurst in 1963 and has continued there every year since. The race was traditionally run on the New South Wales Labour-Day long weekend in early October. Since 2001, the race has been run on the weekend following the long weekend, generally the second weekend of October. | 
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