[4] The obverse of the coin featured the current reigning monarch of Australia (excluding 1936 when Edward VIII was King).

[6] Australian halfpennies depicting George V feature him robed and crowned on the obverse, facing to the left and from bust up.

The effigy of George V used is known to "grace the vast majority of Australia’s rarest and most desirable Commonwealth coins.

"[1] The reverse during this time consisted of the words "ONE HALF PENNY" in three lines at the centre, surrounded by a beaded circle.

[5][6] In 1952, halfpennies were solely struck by the Perth mint, with a dot after the word "Australia" to symbolise this.

[5] Counting the known mintages of proofs, a total of 422,882,890 (422 million) coins of the denomination were minted during its circulation.

Source:[7] The 1916I Mule carries the standard Australian reverse for halfpennies of 1916, however, it is distinguishable by its obverse, which is that of an Indian quarter anna coin.

[7] The historical context of how the Indian Quarter Anna obverse came onto 1916 Halfpenny, is that during World War I the Royal Mint of London assigned the production of a range of Australian coins to the Calcutta Mint, with the reason for this change being that there were allay concerns that the German Navy could have the ability to intercept or sink maritime deliveries of coinage from Britain to Australia.

The 1916 Australian halfpenny and penny were the first non-Indian coins to be produced by the Royal Mint's Calcutta branch.

It appeals to collectors for its rarity, being a crucial component in creating a truly complete Australian Commonwealth coin set, its historical numismatic significance, and being topic of continued debate.

Sources:[7][9] In 1922, the Royal Mint’s Sydney Branch manufactured sixpence and halfpenny coins for the Commonwealth.

The Australian Numismatic Dealers Association regards the double foot 1939 halfpenny as an "extremely rare coin in uncirculated condition.