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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 14,046,17614141437701404101,1002,7001971 21,084,57217181827731101604601,1001972 5,625,06515151537561103601,0002,8001973 4,039,92854626886933201,0002,9007,6001974 8,987,5951313133542821203901,1001975 19,094,9213134353940411003501,0001976 27,320,0043944475455971604601,1001978 25,835,0061515152329682709703,1001978 MuleUnknown         1979 24,956,2062122222424371808603,5001979 Double BarIncl. in above59697691933201,0002,9007,6001980 38,781,0001414142532542309203,3001980 Double BarIncl. in above3539414647482209003,3001981 24,288,000141414222334512209201983 49,078,7001920202124291608203,7001984 26,431,01418181919262937190860 MintagePR65DCAMPR66DCAMPR67DCAMPR68DCAMPR69DCAMPR70DCAM1969 Proof13,056417782946901,0001971 Proof10,0661201201301305509501972 Proof10,272747678802405701973 Proof10,0908686871102906501974 Proof10,9185974933201,0002,9001975 Proof23,02122222227592401976 Proof21,20022232344861,4001978 Proof38,51918202236466801979 Double Bar Proof36,0061001001001001109401979 ProofIncl. in above27313438429301980 Proof68,00023252832431301981 Proof86,10022252840581001983 Proof80,00028333946556501984 Proof61,0002123252750810 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.