Mule (Hybrid) - A coin struck from dies not originally intended to be used together.

Check your change !!

February 2002, an interesting article appeared in the Australasian Coin & Banknote magazine. It was about a 2000 $1 coin, found in New South Wales. With smaller letterting and smaller Queen's head compared to the normal $1 coin, it also has what appears to be a double rim, in which a 10c coin sits perfectly.

      mule                                  normal

I would like to thank Ken of Western Australia for the mule image, while my image of the normal $1 isn't quite up to par, the differences can be seen, especially the double rim. This $1 coin is recognised as being muled with a 10 cent obverse. So keep an eye out for this one, it has the kangaroo reverse.

More decimal mules

1977 50 cent - Silver Jubilee, 3 coins with the Coat of Arms are known to exist.

1978 50 cent - muled with a Fiji reverse, Tasmanian Numismatic Society (Internet Newsletter Sept.2005)

1978 20 cent - muled with a Fiji reverse, depicts a Tabua on a Braided Sennit Cord.

1978 5 cent - muled with a Fiji reverse, I.S.Wright postal bid auction 28, July 1993, Unc, Est $2000

1988 5 cent - muled with a Cook Island obverse, Status International auction June 2005 Est $750-$1000

2001 $200 - Proof Silver Kookaburra. The person assembling the reverse and obverse dies for the 2001 Australian Proof Kookaburra Silver 1 Oz Coin accidentally paired the obverse of the $200 platinum coin with that of the 2001 Silver Kooka reverse which was of about the same size.
(McDonald's Aust. Coin & Banknotes 11th edition....page 261)

Interesting reading on mules
Ian McConnelly "Mules for discussion" - Australasian Coin & Banknote magazine October 2002
Scott Wren "Jubilation" - Australasian Coin & Banknote magazine April 2003
Scott Wren "Stubborn Mule Definition" - Australasian Coin & Banknote magazine August 2003

Happy hunting