A silver coin (28 mm diameter with milled edge) featuring on the obverse a laureate bust of Elizabeth II facing right; around, ELIZABETH II . DEI . GRATIA . REGINA +
The reverse is based on the arms of the Commonwealth of Australia, as authorised by Royal Warrant 19 September 1912 - composed of a shield divided into six parts, each containing a representation of the badge of a State (although that of South Australia is depicted as three sheaves of wheat above a rising sun instead of the authorised Piping Shrike). The shield is supported by a kangaroo and an emu standing on a grassy mound accompanied by small branches of wattle. Above the shield is a crown instead of the Federation star.
Around above, FLORIN between two seven pointed stars; and below, in the exergue, the date, 1953 curved below which, AUSTRALIA. The artist's initials KG are in the field above the back of the emu.
This was the first issue for Elizabeth II.
Some specimens (proofs) were produced this year for official purposes only. According to CoinFactsWiki:
"Struck for Queen Elizabeth II's Coronation in 1953, a minuscule total of twelve, penny through florin, sets were officially produced at the Melbourne Mint, with the entire mintage ending up in the possession of the Chase Manhattan Bank in New York for their currency museum. Clearly, later deaccessioned or distributed, less than half of these have made their way to auction over the following six decades. The Halfpenny, missing from the standard Coronation set, was actually struck separately at the Perth mint (identified by the dot after Australia). While the true mintage remains unknown, its rarity likely even surpasses that of the sets."