about obverse designs
Australian decimal coins have carried four portraits of Her Majesty Queen Elizabeth the Second.
The inclusion of an effigy of the Queen on the obverse of Australia's coinage is mandated by Regulation 4 (c) of the Currency Regulations made under the Currency Act 1965. Portraits of Her Majesty have all faced to the right in line with a convention, said to have commenced with Charles II (1660-1685), that the new Monarch's portrait would face in a direction opposite to that of their predecessor.