Platinum Twentieth-Ounce (1/20 oz), Australian Koala, Coin Type from Australia - detailed information

Platinum Twentieth-Ounce (1/20 oz), Australian Koala, Coin Type from Australia (issued 1989 - )
Coin TypePlatinum Twentieth-Ounce (1/20 oz), Australian Koala

The Australian twentieth-ounce platinum piece (abbreviated as 1/20 oz and designated with Pt for "Platinum") is a bullion coin format.

The Platinum Koala series was introduced by the Perth Mint in 1988 following the large success of Australia’s gold coins in the previous year, and the approval on 18 June 1987 by the Australian government of the minting of platinum and silver coins. It is the world's first platinum bullion coin (the American Platinum Eagle series started nine years later, in 1997). The 1/20oz format was added to the range in 1989. Regular production of the series was discontinued after 2000 due to low demand; after that time, there are only some commemorative issues.

The overall weight of the coins is slightly over one twentieth of an ounce, so as (accounting for the purity of the alloy) to have exactly 0.050 ounce of platinum content.

Obverse
Australia / Platinum Twentieth-Ounce (1/20 oz), Australian Koala - obverse photo

Effigy of the ruling monarch, legend, face value.

Obverse Inscription Legend of the ruling monarch, face value
Reverse
Australia / Platinum Twentieth-Ounce (1/20 oz), Australian Koala - reverse photo

Various designs as individually described below, all depicting koalas.

Reverse Inscription 1/20 oz 9995 PLATINUM
EdgeMilledEdge InscriptionNone
Notes

Coin weight and dimensions are given as per the certificates provided with the proof editions.

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Platinum Twentieth-Ounce (1/20 oz), Australian Koala: Details
CountryAustralia
CurrencyAustralian Dollar
From1989
Face Value5 (x Dollar)
CurrentYes
Material0.9995 Platinum
Designer
TechnologyMilled (machine-made)
ShapeRound
OrientationMedal Alignment (Axis 0)
Size14.1000 mm
Thickness1.3200 mm
Mass1.5710 g