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Dodecagonal Type I

1966 - 84

The dodecagonal type I fifty cent was issued to replace the round 1966 fifty cent from 1969 to 1984 with a number of patterns dated 1966 and 1967. It is struck on a dodecagonal planchetwith the Arnold Machin portrait of HM Queen Elizabeth II on the obverse, and Stuart Devlin's interpretation of the Australian coat of arms on the reverse. Devlin's initials (SD) can be found on the bottom of the reverse underneath the denomination. The type was struck exclusively at the Royal Australian mint in Canberra.

Initials of artist Stuart Devlin (SD) on a 1974 Proof Fifty Cent piece.

A coin struck as a representation piece of a coin that never eventuatedThe piece of metal a coin is struck onThe tails side of the coinThe heads side of the coin

 MintageAU50AU55AU58MS64MS65MS66MS67MS68MS691969 14,046,1767.3088.4056711405106507401971 21,084,5724.607.70103643631805406801972 5,625,0659.30172761741205006407301973 4,039,9286.20101577921304806707701974 8,987,5955.409.10133076851405106501975 19,094,92158.10112530441305006501976 27,320,0043.505.507.401552571805406801978 25,835,0065.108.30112635683404405101978 MuleUnknown         1979 24,956,2064.707.6010232932392002601979 Double BarIncl. in above         1980 38,781,0004.407.20102129442202903301980 Double BarIncl. in above7.4013194351562803704201981 24,288,0004.607.6010232730954806201983 49,078,7004.407.20102123271205006401984 26,431,0143.305.206.9013212735180230 MintagePR65DCAMPR66DCAMPR67DCAMPR68DCAMPR69DCAMPR70DCAM1969 Proof13,0567189981007301,3001971 Proof10,066505965721705301972 Proof10,27274881001203206801973 Proof10,0906071851003607201974 Proof10,918404754751905501975 Proof23,02123263137673401976 Proof21,20025283438481,0001978 Proof38,51916192232407401979 Double Bar Proof36,0066779941101301,0001979 ProofIncl. in above23242832411,0001980 Proof68,00017203134428201981 Proof86,10017202325439501983 Proof80,00022262832397401984 Proof61,0001416182143900 Mintage1966 PatternUnknown1967 PatternUnknown1967 Uniface Obverse PatternUnknown1969 Specimen2,0001977 Pattern7 KnownValues 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.