1923 Australia Halfpenny Fine (Cleaned) - Key DateIf the 1930 Penny is the 'King' of predecimal coinage the 1923 Halfpenny would be the logical 'Prince'. With an estimated mintage of just 15,000 it is incredibly rare and particularly in higher grades. This example has the number '2' stamped on the obverse (not something that occurred at the mint) 1923 Halfpenny Weight 5. 67 grams Composition 97% Copper, 2. 5% Zinc 0. 5% Tin Mint Melbourne Grade Fine (This coin has also been cleaned)