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Twenty Cent

1966 - 2006

Type I

The Type I twenty cent was issued from 1966 to 1984 with an additional proof striking in silver in 2006 as part of the 40th anniversary of decimal coinage set. The reverse features Stuart Devlin's platypus design and the obverse features Ian Rank-Broadly's portrait of HM Queen Elizabeth II.

The issue was struck at the Royal Australian Mint in all years with additional assistance provided by the Royal Mint London in 1966 to address the huge demand for new currency as a result of the vast amount of pre-decimal currency withdrawn. To distinguish between the 1966 London and Canberra coins one must look closely at the point of the wave near the platypus' head. There is no gap (or a very small gap) between the swirl and the head it is the London coin and a distinct gap on the Canberra one. Unfortunately a slightly weaker strike on one of the London minted coins can lead to a small gap causing confusion.

No gap between swirl point and platypus indicates that this 1966 piece was minted in London.

Gap between swirl point and platypus indicates that this 1966 piece was minted in Canberra.

In 1981, the Wales mint assisted with striking coins to meet the additional demand for circulation currency brought about by the economic boom of the 1980s.

A coin struck from specially prepared dies to strike a superior quality coin not intended for circulationCurrency in equivalent units of base 10The tails side of the coinThe heads side of the coinDenominations without base 10 equivalentsa facility that produces coins

 MintageAU50AU55AU58MS64MS65MS66MS67MS68MS691966 Sans Gap30,067,2504654597174762505301,0001966 Wavy 2 baselineIncl. in above6109701,2002,3003,1003,4003,8004,2004,7001966 Gap28,234,6592224252855931503909101967 83,847,00034384150552107302,3006,6001968 40,537,00043495464661505608501,1001969 16,551,1762224252834682407702,2001970 23,761,230171819202129321506601971 8,975,572171819205771892808101972 16,682,065121213132336663006701973 23,386,928151616273046722407701974 33,573,475181920272937381706801975 53,330,1211111112327321506602,5001976 59,814,004141515161619321203501977 41,400,010232527293030512007201978 37,502,006131414141522451807101978 MuleUnknown         1979 22,370,006171818202020261306301980 84,457,000101010161720251306301981 Four claws115,623,000101010161822286008801981 Scalloped Edge8 known3,8006,9009,90020,00022,00024,00026,00029,00032,0001981 Three and a half claws50,000,00032363945721001503809001982 76,799,950141415151619261306301983 55,268,700*333841471907102,3007,20019,0001984 27,970,014*2528293333404769240 MintagePR65DCAMPR66DCAMPR67DCAMPR68DCAMPR69DCAMPR70DCAM1966 London Mint ProofUnknown      1966 Proof18,066465165833506401969 Proof13,05622233041852701970 Proof15,36824252728672301971 Proof10,06631425674993001972 Proof10,272353636371003001973 Proof10,09017172130572101974 Proof10,91824273135742501975 Proof23,02118202224271301976 Proof21,2001619222839591977 Proof55,00614171923263501978 Proof38,51914141417304101979 Proof36,00613151719626401980 Proof68,00012131722302901981 Proof86,10021222325291401982 Proof100,0001316182226891983 Proof80,00015171820361701984 Proof61,00015161717361502006 Silver Proof5,829      Values are in AUD and are retail price estimations based on past sales of coins certified by PCGS or NGC and as such values only related to such graded coins. Uncertified coins or coins graded by other services would likely be worth significantly less. For wholesale pricing please refer to the Red Sheet. While all attempts to ensure accurate pricing, data entry errors can occur and as such no warranty is expressed or implied as to the accuracy of any information published on this website. It is important to verify all published sales to ensure the accuracy of the pricing when making any purchase decision. Any personal information provided to us is protected by the Privacy Act 1988.