2006 saw the 40th anniversary of the introduction of decimal currency in 1966. To celebrate this, the coins in the Fine Silver Year Set with the original Arnold Machin effigy of Queen Elizabeth II. The coloured series of dollars were first available in 2006 and were commenced with the Ocean Series with 2 issues and continued through 2007. We also had Melbourne hosting the Commonwealth Games in 2006 a dollar coin (plus a large number of 50c coins) were released to celebrate this.
A Mob of Roos dollar was the standard circulation coin of 2006 and there were no commemorative dollars issued for circulation for that year. The 50 Years of Television dollar was the mintmark coin for 2006 with portable press issues as well as heavy press issues with the differing mintmarks.