Obverse
Portrait of the Queen Elizabeth II in the field of the coin.
Lettering: ELIZABETH II AUSTRALIA *YEAR* RDM
Reverse
Duckbill Platypus.
Lettering: 20 SD
Extended information
Denomination
Currency
Metal
Copper-Nickel
Krause catalog
KM# 82
Ruler
Weight
11.3 g.
Diameter
28.5
mm.
Thickness
2.5 mm.
Alignment
Medal ↑↑
Shape
Round
Edge
Reeded