Australia 1954 Sixpence Struck on Defective Planchet

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Coin Type:Australia Sixpence
Grade:Uncirculated
Year:1954
Mint:Melbourne
Metal:50% silver, 40% copper, 5% zinc, 5% nickel
Obverse:Elizabeth II (Mary Gillick)
Reverse:Coat of Arms (George Kruger Gray)

A lovely prooflike 1954 sixpence struck on a defective planchet. Note the metal impurity flaw on the reverse at about 9pm. Note also the weakness on the obverse opposite the impurity indicating the flaw was present when the coin was struck. Errors of this type are not often seen.