An Australian 1979 One Dollar note (Knight / Stone - Serial DDZ), uncirculated and in absolute mint condition could fetch up to $18 AUD. If it has been circulated but still in good condition, it might fetch anything from $1 to $5 AUD.
A reputable coin dealer will be able to give a more accurate valuation.
Twenty Australian dollars
There were no 1968 Australian Five Dollar notes printed.
There were no Australian Fifty Dollar notes printed in 1984.
An Australian One Dollar note (Knight/Stone) serial CSY was printed in 1979.
An Australian One Dollar note serial CZR was most likely printed in 1979.
The last Australian One Dollar note was issued in 1982 and they were progressively withdrawn from circulation after the introduction of the One Dollar coin in 1984.
There were no 2003 Australian Ten Dollar star notes issued.
Australia did not have its own currency in 1907. The Australian Five Pound note was first issued in 1914. The Australian Five Dollar note was first issued in 1967.
The One Dollar note was not introduced into the Australian currency until the 14th of February 1966, at the introduction of decimal currency.
Australian One Dollar notes with the serial range CPK to DGH were printed in 1979.
It is worth exactly one Australian dollar, unless the note is somehow rarer or worth more to a collector.
There is no bird on the Australian Ten Dollar note.