This is a list of known (or rumoured) upset decimal coins which is being maintained by an Australian Coin Forum member. If you’re wondering what an upset coin is then you should take a look at this article on the Australian Coin Collecting Blog. $2 1995 (Unconfirmed) $1 1985 MoR (Confirmed) $1 1996 Parkes @ […]
The rabbit ear on the mob of roos Australian 1 dollar coin is caused by a die break or chip resulting in a raised cud representing an extra ear on the top kangaroo. It can be found on the 1984, 1985, 1994, 1998, 2000, 2006, 2008, 2009, 2010, 2013, 2015 and 2016 dated dollar coins. […]
Die clash occurs when the two dies, the reverse and obverse impact each other without a coin planchet between them. It can leave the impression of one of the dies on the other at the low points of the design. In the case of this 1998 10c particularly in the fields around the portrait and […]
Some Australian 2010 50 cent coins have been found to be “upset”. Which means that the designs on the obverse and reverse designs were not aligned correctly when the coins were minted. The Australian 50 cent coin is usually minted with the obverse and reverse designs in “medallic alignment”. This basically means that the two […]
In 1994 the Royal Australian Mint released the Year of the Family 50 cent coin into circulation (see image above). It has been noted that the there are two varieties of this coin. The spacing between the first two numerals (1 and 9) and the following two (9 and 4) in the date can vary […]
One dollar coin errors and varieties master index.
The dollar coin was introduced in 1984 replacing the one dollar note that had circulated since the introduction of decimal currency in 1966. The first coin bore the Arnold Machin portrait of Queen Elizabeth and the reverse depicting 5 kangaroos was sculpted by Stuart Devlin. The design quickly became known as the “mob of roos” […]
Some 2008 Mob of Roos dollar coins present cuds caused by a chipped die. These appear on the bottom of the tail of the largest kangaroo to the left of the numeral and a cud on the number 1 at the top left of the numeral. Examples have been found with each cud indicating it’s […]
The tiny Australian 5 cent piece is quite susceptible to breaks in the die causing cuds particularly on the echidnas claws. These examples on the 2009 dated 5c. Images show the progression of the deterioration of the die, with new cuds appearing as the deterioration continues.
5 Cent Errors and varieties master index.