Australian Platinum Platypus proof coin has .9995 purity, a $100 face value and weighs one troy ounce. The coins are part of a coin series that was first minted in 2011 by the Perth Mint of Australia. The reverse side of the coin depicts the famous duck-billed platypus which calls the fresh waters of Australia its home. The obverse side of the coin features depiction of Queen Elizabeth II.
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