Avid collectors are being advised to keep rare coins featuring Queen Elizabeth II close, as special commemorative pieces are tipped to rise in value over the coming years.
The Queen was first commemorated on Australian currency in 1953, when she was crowned, and has appeared on more money than any other person in history.
Since the beginning of her 70-year reign, there have been six different depictions of the Queen on the "heads side" of Australian coins.
