Twenty Cents Platypus, Coin Type from Australia - detailed information

Twenty Cents Platypus, Coin Type from Australia (issued 1966 - )
Coin TypeTwenty Cents Platypus

The 20 cent coin was first introduced with decimalisation on 14 February 1966. Given that the earlier Australian Pound was equal to 240 pence, and the new Australian Dollar was introduced at two dollars to the pound, the twenty cents denomination was exactly equal to the earlier Australian Florin - both in value and in size (the coins were made of the same dimensions and mass). It is thus a direct descendant of the British Florin.

The original reverse design by Stuart Devlin has not been changed since the introduction. This denomination has since been used infrequently for commemorative designs too.

All of the first issue of 20 cent coins in 1966 was produced at the Royal Mint, London. The Royal Australian Mint did not commence 20 cent coin production until the next financial year (striking coins dated 1966, as listed on its web site). Quantities of 20 cents have also been struck later by the Royal Mint, Llantrisant and the Royal Canadian Mint.

Composition: 75% copper, 25% nickel.

Obverse

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.

Obverse InscriptionLegend of the ruling monarch, date
Reverse

A platypus swimming. The denomination numeral 20 [cents] is above the head of the mammal; the artist's initials SD (for Stuart Devlin) are in (very) tiny letters, within the swirl of water around its right forepaw.

Reverse Inscription20
EdgeMilled
Edge InscriptionNone
All Coins of Type: Twenty Cents Platypus (54)
Coin NameMintageEffigyLegend
Twenty Cents 1966 58,241,110 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1966
Twenty Cents 1967 83,848,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1967
Twenty Cents 1968 40,537,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1968
Twenty Cents 1969 16,514,999 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1969
Twenty Cents 1970 23,286,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1970
Twenty Cents 1971 8,957,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1971
Twenty Cents 1972 16,653,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1972
Twenty Cents 1973 23,366,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1973
Twenty Cents 1974 33,559,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1974
Twenty Cents 1975 53,323,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1975
Twenty Cents 1976 59,795,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1976
Twenty Cents 1977 41,327,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1977
Twenty Cents 1978 37,439,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1978
Twenty Cents 1979 22,336,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1979
Twenty Cents 1980 84,468,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1980
Twenty Cents 1981 165,589,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1981
Twenty Cents 1982 76,700,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1982
Twenty Cents 1983 55,193,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1983
Twenty Cents 1984 27,881,000 Portrait by Arnold Machin (Second Portrait) ELIZABETH II AUSTRALIA 1984
Twenty Cents 1985 2,775,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1985
Twenty Cents 1986 (mint sets only) 247,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1986
Twenty Cents 1987 (mint sets only) 270,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1987
Twenty Cents 1988 (mint sets only) 346,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1988
Twenty Cents 1989 (mint sets only) 217,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1989
Twenty Cents 1990 (mint sets only) 156,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1990
Twenty Cents 1991 (mint sets only) 189,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1991
Twenty Cents 1992 (mint sets only) 164,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1992
Twenty Cents 1993 (mint sets only) 130,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1993
Twenty Cents 1994 14,369,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1994
Twenty Cents 1995 Platypus (mint sets only) 132,269 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1995
Twenty Cents 1996 20,637,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1996
Twenty Cents 1997 16,762,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1997
Twenty Cents 1998 28,862,000 Portrait by Raphael Maklouf (Third Portrait) ELIZABETH II AUSTRALIA 1998
Twenty Cents 1999 64,209,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 1999
Twenty Cents 2000 35,648,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2000
Twenty Cents 2001 82,026,569 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2001
Twenty Cents 2002 27,283,514 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2002
Twenty Cents 2004 72,100,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2004
Twenty Cents 2005 58,600,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2005
Twenty Cents 2006 102,462,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2006
Twenty Cents 2007 42,712,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2007
Twenty Cents 2008 132,900,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2008
Twenty Cents 2009 43,600,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2009
Twenty Cents 2010 59,900,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2010
Twenty Cents 2011 15,100,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2011
Twenty Cents 2012 34,600,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2012
Twenty Cents 2013 43,900,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2013
Twenty Cents 2014 52,300,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2014
Twenty Cents 2015 24,400,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2015
Twenty Cents 2016 34,400,000 Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2016
Twenty Cents 2017 unknown Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2017
Twenty Cents 2018 unknown Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2018
Twenty Cents 2019 (Fourth Portrait) unknown Portrait by Ian Rank-Broadley (Fourth Portrait) ELIZABETH II AUSTRALIA 2019
Twenty Cents 2019 (Fifth Portrait) unknown Portrait by Jody Clark (Fifth Portrait) ELIZABETH II ยท AUSTRALIA 2019
Twenty Cents Platypus: Details
CountryAustralia
CurrencyAustralian Dollar
Sub-type ofTwenty Cents
From1966
Face Value20 (x Cent)
CurrentYes
MaterialCuproNickel
DesignerStuart Devlin
TechnologyMilled (machine-made)
ShapeRound
Size (mm)28.6500
Thickness (mm)2.5200
Mass (g)11.3000
Twenty Cents Platypus: Photos
ImageDetails
Specimen Coin - 20 Cents, Australia, 1966
Copyright: Museums Victoria / CC BY
Author:
Notes: Royal Mint London.
Source
Specimen Coin - 20 Cents, Australia, 1966
Copyright: Museums Victoria / CC BY
Author:
Source