The 1923 Halfpenny, like the 1930 Penny, is a coin shrouded in mystery. Exactly why it is so scarce is difficult to establish, but the fact remains that this copper icon must indeed have been struck in the tiniest of numbers. The key to Australia’s 1911-64 Halfpenny Series, the 1923 Halfpenny is rightly considered to be a great Australian rarity.